121100202111210 has 128 divisors (see below), whose sum is σ = 332740353392640. Its totient is φ = 27631738600704.

The previous prime is 121100202111173. The next prime is 121100202111233. The reversal of 121100202111210 is 12111202001121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121100202111210.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1488426511 + ... + 1488507869.

It is an arithmetic number, because the mean of its divisors is an integer number (2599534010880).

Almost surely, 2^{121100202111210} is an apocalyptic number.

121100202111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121100202111210 is an abundant number, since it is smaller than the sum of its proper divisors (211640151281430).

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

121100202111210 is a wasteful number, since it uses less digits than its factorization.

121100202111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93660.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121100202111210 its reverse (12111202001121), we get a palindrome (133211404112331).

The spelling of 121100202111210 in words is "one hundred twenty-one trillion, one hundred billion, two hundred two million, one hundred eleven thousand, two hundred ten".