123210121131 has 6 divisors (see below), whose sum is σ = 177970174980. Its totient is φ = 82140080748.

The previous prime is 123210121103. The next prime is 123210121157. The reversal of 123210121131 is 131121012321.

It is not a de Polignac number, because 123210121131 - 2¹³ = 123210112939 is a prime.

It is a super-2 number, since 2×123210121131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123210121171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6845006721 + ... + 6845006738.

It is an arithmetic number, because the mean of its divisors is an integer number (29661695830).

Almost surely, 2^123210121131 is an apocalyptic number.

123210121131 is a deficient number, since it is larger than the sum of its proper divisors (54760053849).

123210121131 is a wasteful number, since it uses less digits than its factorization.

123210121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13690013465 (or 13690013462 counting only the distinct ones).

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

Adding to 123210121131 its reverse (131121012321), we get a palindrome (254331133452).

The spelling of 123210121131 in words is "one hundred twenty-three billion, two hundred ten million, one hundred twenty-one thousand, one hundred thirty-one".