121100122202220 has 144 divisors (see below), whose sum is σ = 419825138503680. Its totient is φ = 27679277501568.

The previous prime is 121100122202219. The next prime is 121100122202221. The reversal of 121100122202220 is 22202221001121.

It is a happy number.

121100122202220 is a `hidden beast` number, since 1 + 21 + 100 + 122 + 202 + 220 = 666.

121100122202220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (121100122202219) and next prime (121100122202221).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121100122202193 and 121100122202202.

It is not an unprimeable number, because it can be changed into a prime (121100122202221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45868861 + ... + 48437099.

It is an arithmetic number, because the mean of its divisors is an integer number (2915452350720).

Almost surely, 2^{121100122202220} is an apocalyptic number.

121100122202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100122202220 is an abundant number, since it is smaller than the sum of its proper divisors (298725016301460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121100122202220 is a wasteful number, since it uses less digits than its factorization.

121100122202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2605684 (or 2605679 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121100122202220 its reverse (22202221001121), we get a palindrome (143302343203341).

The spelling of 121100122202220 in words is "one hundred twenty-one trillion, one hundred billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty".