123131221210 has 32 divisors (see below), whose sum is σ = 237125894400. Its totient is φ = 45895325760.

The previous prime is 123131221193. The next prime is 123131221231. The reversal of 123131221210 is 12122131321.

It is a super-2 number, since 2×123131221210² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 5300370 + ... + 5323549.

It is an arithmetic number, because the mean of its divisors is an integer number (7410184200).

Almost surely, 2^123131221210 is an apocalyptic number.

123131221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123131221210 is a deficient number, since it is larger than the sum of its proper divisors (113994673190).

123131221210 is a wasteful number, since it uses less digits than its factorization.

123131221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10624006.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123131221210 its reverse (12122131321), we get a palindrome (135253352531).

The spelling of 123131221210 in words is "one hundred twenty-three billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred ten".