121111100100210 has 64 divisors (see below), whose sum is σ = 317102528674944. Its totient is φ = 29359188134400.

The previous prime is 121111100100173. The next prime is 121111100100239. The reversal of 121111100100210 is 12001001111121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2274070 + ... + 15728750.

It is an arithmetic number, because the mean of its divisors is an integer number (4954727010546).

Almost surely, 2^{121111100100210} is an apocalyptic number.

121111100100210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111100100210 is an abundant number, since it is smaller than the sum of its proper divisors (195991428574734).

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

121111100100210 is a wasteful number, since it uses less digits than its factorization.

121111100100210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13481979.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121111100100210 its reverse (12001001111121), we get a palindrome (133112101211331).

The spelling of 121111100100210 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred million, one hundred thousand, two hundred ten".