121012112221100 has 72 divisors (see below), whose sum is σ = 272684224280160. Its totient is φ = 46558009684480.

The previous prime is 121012112221073. The next prime is 121012112221159. The reversal of 121012112221100 is 1122211210121.

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, 78568697 + ... + 80094096.

It is an arithmetic number, because the mean of its divisors is an integer number (3787280892780).

Almost surely, 2^{121012112221100} is an apocalyptic number.

121012112221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012112221100 is an abundant number, since it is smaller than the sum of its proper divisors (151672112059060).

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

121012112221100 is a wasteful number, since it uses less digits than its factorization.

121012112221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158663099 (or 158663092 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121012112221100 its reverse (1122211210121), we get a palindrome (122134323431221).

The spelling of 121012112221100 in words is "one hundred twenty-one trillion, twelve billion, one hundred twelve million, two hundred twenty-one thousand, one hundred".