123210131121 has 48 divisors (see below), whose sum is σ = 222016878720. Its totient is φ = 63967196160.

The previous prime is 123210131081. The next prime is 123210131131. The reversal of 123210131121 is 121131012321.

123210131121 is a `hidden beast` number, since 1 + 232 + 101 + 311 + 21 = 666.

It is not a de Polignac number, because 123210131121 - 2⁹ = 123210130609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123210131094 and 123210131103.

It is not an unprimeable number, because it can be changed into a prime (123210131131) 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, 1132321 + ... + 1236353.

It is an arithmetic number, because the mean of its divisors is an integer number (4625351640).

Almost surely, 2^123210131121 is an apocalyptic number.

123210131121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123210131121 is a deficient number, since it is larger than the sum of its proper divisors (98806747599).

123210131121 is a wasteful number, since it uses less digits than its factorization.

123210131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105766 (or 105763 counting only the distinct ones).

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

Adding to 123210131121 its reverse (121131012321), we get a palindrome (244341143442).

The spelling of 123210131121 in words is "one hundred twenty-three billion, two hundred ten million, one hundred thirty-one thousand, one hundred twenty-one".