123311222110021 has 16 divisors (see below), whose sum is σ = 134540562138048. Its totient is φ = 112085088336000.

The previous prime is 123311222110009. The next prime is 123311222110049. The reversal of 123311222110021 is 120011222113321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123311222110021 - 2³¹ = 123309074626373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123311222109974 and 123311222110001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123311222110051) 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, 3518033946 + ... + 3518068996.

It is an arithmetic number, because the mean of its divisors is an integer number (8408785133628).

Almost surely, 2^{123311222110021} is an apocalyptic number.

123311222110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123311222110021 is a deficient number, since it is larger than the sum of its proper divisors (11229340028027).

123311222110021 is a wasteful number, since it uses less digits than its factorization.

123311222110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71652.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 123311222110021 its reverse (120011222113321), we get a palindrome (243322444223342).

The spelling of 123311222110021 in words is "one hundred twenty-three trillion, three hundred eleven billion, two hundred twenty-two million, one hundred ten thousand, twenty-one".