121100011112220 has 96 divisors (see below), whose sum is σ = 407915826931200. Its totient is φ = 26223160299264.

The previous prime is 121100011112177. The next prime is 121100011112221. The reversal of 121100011112220 is 22211110001121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121100011112220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100011112221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7587712015 + ... + 7587727974.

It is an arithmetic number, because the mean of its divisors is an integer number (4249123197200).

Almost surely, 2^{121100011112220} is an apocalyptic number.

121100011112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100011112220 is an abundant number, since it is smaller than the sum of its proper divisors (286815815818980).

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

121100011112220 is a wasteful number, since it uses less digits than its factorization.

121100011112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15175440027 (or 15175440025 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121100011112220 its reverse (22211110001121), we get a palindrome (143311121113341).

The spelling of 121100011112220 in words is "one hundred twenty-one trillion, one hundred billion, eleven million, one hundred twelve thousand, two hundred twenty".