121100213020 has 24 divisors (see below), whose sum is σ = 254317672224. Its totient is φ = 48438709056.

The previous prime is 121100212979. The next prime is 121100213023. The reversal of 121100213020 is 20312001121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100213023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926014 + ... + 1048666.

It is an arithmetic number, because the mean of its divisors is an integer number (10596569676).

Almost surely, 2^121100213020 is an apocalyptic number.

121100213020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100213020 is an abundant number, since it is smaller than the sum of its proper divisors (133217459204).

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

121100213020 is a wasteful number, since it uses less digits than its factorization.

121100213020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172029 (or 172027 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121100213020 its reverse (20312001121), we get a palindrome (141412214141).

The spelling of 121100213020 in words is "one hundred twenty-one billion, one hundred million, two hundred thirteen thousand, twenty".