123011221022031 has 16 divisors (see below), whose sum is σ = 172060377154560. Its totient is φ = 78064430367840.

The previous prime is 123011221021991. The next prime is 123011221022051. The reversal of 123011221022031 is 130220122110321.

It is not a de Polignac number, because 123011221022031 - 2⁹ = 123011221021519 is a prime.

It is a super-2 number, since 2×123011221022031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123011221021989 and 123011221022007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011221022051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9957191575 + ... + 9957203928.

It is an arithmetic number, because the mean of its divisors is an integer number (10753773572160).

Almost surely, 2^{123011221022031} is an apocalyptic number.

123011221022031 is a deficient number, since it is larger than the sum of its proper divisors (49049156132529).

123011221022031 is a wasteful number, since it uses less digits than its factorization.

123011221022031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19914395606.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 123011221022031 its reverse (130220122110321), we get a palindrome (253231343132352).

The spelling of 123011221022031 in words is "one hundred twenty-three trillion, eleven billion, two hundred twenty-one million, twenty-two thousand, thirty-one".