121022222220 has 36 divisors (see below), whose sum is σ = 367100741280. Its totient is φ = 32272592544.

The previous prime is 121022222213. The next prime is 121022222231. The reversal of 121022222220 is 22222220121.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 121022222193 and 121022222202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336172660 + ... + 336173019.

Almost surely, 2^121022222220 is an apocalyptic number.

121022222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121022222220 is an abundant number, since it is smaller than the sum of its proper divisors (246078519060).

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

121022222220 is a wasteful number, since it uses less digits than its factorization.

121022222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672345694 (or 672345689 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 121022222220 its reverse (22222220121), we get a palindrome (143244442341).

It can be divided in two parts, 12102 and 2222220, that added together give a palindrome (2234322).

The spelling of 121022222220 in words is "one hundred twenty-one billion, twenty-two million, two hundred twenty-two thousand, two hundred twenty".