123112112211 has 48 divisors (see below), whose sum is σ = 199935415680. Its totient is φ = 72353554560.

The previous prime is 123112112209. The next prime is 123112112219. The reversal of 123112112211 is 112211211321.

It is a happy number.

123112112211 is a `hidden beast` number, since 1 + 231 + 1 + 211 + 221 + 1 = 666.

It is not a de Polignac number, because 123112112211 - 2¹ = 123112112209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123112112219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 487695 + ... + 695751.

It is an arithmetic number, because the mean of its divisors is an integer number (4165321160).

Almost surely, 2^123112112211 is an apocalyptic number.

123112112211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123112112211 is a deficient number, since it is larger than the sum of its proper divisors (76823303469).

123112112211 is a wasteful number, since it uses less digits than its factorization.

123112112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208256 (or 208253 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 123112112211 its reverse (112211211321), we get a palindrome (235323323532).

The spelling of 123112112211 in words is "one hundred twenty-three billion, one hundred twelve million, one hundred twelve thousand, two hundred eleven".