121122222100020 has 72 divisors (see below), whose sum is σ = 367757687431680. Its totient is φ = 32268172305600.

The previous prime is 121122222100007. The next prime is 121122222100031. The reversal of 121122222100020 is 20001222221121.

It is a happy number.

121122222100020 is a `hidden beast` number, since 1 + 211 + 2 + 222 + 210 + 0 + 0 + 20 = 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 = 121122222099966 and 121122222100002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 323634556 + ... + 324008595.

Almost surely, 2^{121122222100020} is an apocalyptic number.

121122222100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121122222100020 is an abundant number, since it is smaller than the sum of its proper divisors (246635465331660).

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

121122222100020 is a wasteful number, since it uses less digits than its factorization.

121122222100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647644205 (or 647644200 counting only the distinct ones).

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

Adding to 121122222100020 its reverse (20001222221121), we get a palindrome (141123444321141).

The spelling of 121122222100020 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred thousand, twenty".