121231110320100 has 216 divisors, whose sum is σ = 415951735635072. Its totient is φ = 29289054393600.

The previous prime is 121231110320059. The next prime is 121231110320153. The reversal of 121231110320100 is 1023011132121.

121231110320100 is a `hidden beast` number, since 1 + 2 + 1 + 231 + 1 + 10 + 320 + 100 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17996172 + ... + 23797571.

It is an arithmetic number, because the mean of its divisors is an integer number (1925702479792).

Almost surely, 2^{121231110320100} is an apocalyptic number.

121231110320100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121231110320100 is an abundant number, since it is smaller than the sum of its proper divisors (294720625314972).

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

121231110320100 is a wasteful number, since it uses less digits than its factorization.

121231110320100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41794067 (or 41794057 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121231110320100 its reverse (1023011132121), we get a palindrome (122254121452221).

The spelling of 121231110320100 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, one hundred ten million, three hundred twenty thousand, one hundred".