1231212106210 has 32 divisors (see below), whose sum is σ = 2243028276720. Its totient is φ = 486528565248.

The previous prime is 1231212106193. The next prime is 1231212106237. The reversal of 1231212106210 is 126012121321.

It can be written as a sum of positive squares in 8 ways, for example, as 122122990521 + 1109089115689 = 349461^2 + 1053133^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426264 + ... + 1626076.

Almost surely, 2^{1231212106210} is an apocalyptic number.

1231212106210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231212106210 is a deficient number, since it is larger than the sum of its proper divisors (1011816170510).

1231212106210 is a wasteful number, since it uses less digits than its factorization.

1231212106210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201062.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 1231212106210 its reverse (126012121321), we get a palindrome (1357224227531).

The spelling of 1231212106210 in words is "one trillion, two hundred thirty-one billion, two hundred twelve million, one hundred six thousand, two hundred ten".