121122100020 has 24 divisors (see below), whose sum is σ = 339141880224. Its totient is φ = 32299226656.

The previous prime is 121122100007. The next prime is 121122100039. The reversal of 121122100020 is 20001221121.

It is a super-2 number, since 2×121122100020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121122099969 and 121122100005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009350774 + ... + 1009350893.

It is an arithmetic number, because the mean of its divisors is an integer number (14130911676).

Almost surely, 2^121122100020 is an apocalyptic number.

121122100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121122100020 is an abundant number, since it is smaller than the sum of its proper divisors (218019780204).

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

121122100020 is a wasteful number, since it uses less digits than its factorization.

121122100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018701679 (or 2018701677 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121122100020 its reverse (20001221121), we get a palindrome (141123321141).

The spelling of 121122100020 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred thousand, twenty".