121011222222 has 24 divisors (see below), whose sum is σ = 286026525720. Its totient is φ = 36670067280.

The previous prime is 121011222221. The next prime is 121011222223. The reversal of 121011222222 is 222222110121.

It is a happy number.

121011222222 is a `hidden beast` number, since 1 + 210 + 11 + 222 + 222 = 666.

It is an interprime number because it is at equal distance from previous prime (121011222221) and next prime (121011222223).

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 = 121011222195 and 121011222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011222221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305583697 + ... + 305584092.

It is an arithmetic number, because the mean of its divisors is an integer number (11917771905).

Almost surely, 2^121011222222 is an apocalyptic number.

121011222222 is an abundant number, since it is smaller than the sum of its proper divisors (165015303498).

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

121011222222 is a wasteful number, since it uses less digits than its factorization.

121011222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611167808 (or 611167805 counting only the distinct ones).

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

Adding to 121011222222 its reverse (222222110121), we get a palindrome (343233332343).

The spelling of 121011222222 in words is "one hundred twenty-one billion, eleven million, two hundred twenty-two thousand, two hundred twenty-two".