12121211222110 has 96 divisors (see below), whose sum is σ = 24471216866880. Its totient is φ = 4299722431488.

The previous prime is 12121211222101. The next prime is 12121211222129. The reversal of 12121211222110 is 1122211212121.

It is a happy number.

It is a super-2 number, since 2×12121211222110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17206696 + ... + 17897284.

It is an arithmetic number, because the mean of its divisors is an integer number (254908509030).

Almost surely, 2^{12121211222110} is an apocalyptic number.

12121211222110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121211222110 is an abundant number, since it is smaller than the sum of its proper divisors (12350005644770).

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

12121211222110 is a wasteful number, since it uses less digits than its factorization.

12121211222110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690770 (or 690703 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12121211222110 its reverse (1122211212121), we get a palindrome (13243422434231).

The spelling of 12121211222110 in words is "twelve trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, one hundred ten".