121121022222 has 40 divisors (see below), whose sum is σ = 277175311776. Its totient is φ = 39514657248.

The previous prime is 121121022173. The next prime is 121121022233. The reversal of 121121022222 is 222220121121.

It is a happy number.

121121022222 is a `hidden beast` number, since 1 + 211 + 210 + 22 + 222 = 666.

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 = 121121022195 and 121121022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7946223 + ... + 7961450.

Almost surely, 2^121121022222 is an apocalyptic number.

121121022222 is an abundant number, since it is smaller than the sum of its proper divisors (156054289554).

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

121121022222 is a wasteful number, since it uses less digits than its factorization.

121121022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15907734 (or 15907725 counting only the distinct ones).

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

Adding to 121121022222 its reverse (222220121121), we get a palindrome (343341143343).

The spelling of 121121022222 in words is "one hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-two".