131212101123 has 20 divisors (see below), whose sum is σ = 198933704200. Its totient is φ = 86169137472.

The previous prime is 131212101019. The next prime is 131212101127. The reversal of 131212101123 is 321101212131.

It is not a de Polignac number, because 131212101123 - 2¹⁴ = 131212084739 is a prime.

It is a super-2 number, since 2×131212101123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131212101096 and 131212101105.

It is not an unprimeable number, because it can be changed into a prime (131212101127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12083398 + ... + 12094251.

It is an arithmetic number, because the mean of its divisors is an integer number (9946685210).

Almost surely, 2^131212101123 is an apocalyptic number.

131212101123 is a deficient number, since it is larger than the sum of its proper divisors (67721603077).

131212101123 is an equidigital number, since it uses as much as digits as its factorization.

131212101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24177728 (or 24177719 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131212101123 its reverse (321101212131), we get a palindrome (452313313254).

The spelling of 131212101123 in words is "one hundred thirty-one billion, two hundred twelve million, one hundred one thousand, one hundred twenty-three".