121111012210 has 32 divisors (see below), whose sum is σ = 222589710720. Its totient is φ = 47435000448.

The previous prime is 121111012193. The next prime is 121111012223. The reversal of 121111012210 is 12210111121.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 568912 + ... + 752251.

It is an arithmetic number, because the mean of its divisors is an integer number (6955928460).

Almost surely, 2^121111012210 is an apocalyptic number.

121111012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111012210 is a deficient number, since it is larger than the sum of its proper divisors (101478698510).

121111012210 is a wasteful number, since it uses less digits than its factorization.

121111012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321362.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121111012210 its reverse (12210111121), we get a palindrome (133321123331).

The spelling of 121111012210 in words is "one hundred twenty-one billion, one hundred eleven million, twelve thousand, two hundred ten".