121231222100 has 36 divisors (see below), whose sum is σ = 274509659424. Its totient is φ = 46384118880.

The previous prime is 121231222081. The next prime is 121231222117. The reversal of 121231222100 is 1222132121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26352314 + ... + 26356913.

Almost surely, 2^121231222100 is an apocalyptic number.

121231222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121231222100 is an abundant number, since it is smaller than the sum of its proper divisors (153278437324).

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

121231222100 is a wasteful number, since it uses less digits than its factorization.

121231222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52709264 (or 52709257 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121231222100 its reverse (1222132121), we get a palindrome (122453354221).

The spelling of 121231222100 in words is "one hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, one hundred".