123021021211331 has 4 divisors (see below), whose sum is σ = 123478348428000. Its totient is φ = 122563693994664.

The previous prime is 123021021211303. The next prime is 123021021211367. The reversal of 123021021211331 is 133112120120321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123021021211331 - 2²² = 123021017017027 is a prime.

It is a super-2 number, since 2×123021021211331² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123021021211297 and 123021021211306.

It is not an unprimeable number, because it can be changed into a prime (123021021211831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228663607931 + ... + 228663608468.

It is an arithmetic number, because the mean of its divisors is an integer number (30869587107000).

Almost surely, 2^{123021021211331} is an apocalyptic number.

123021021211331 is a deficient number, since it is larger than the sum of its proper divisors (457327216669).

123021021211331 is an equidigital number, since it uses as much as digits as its factorization.

123021021211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457327216668.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 123021021211331 its reverse (133112120120321), we get a palindrome (256133141331652).

The spelling of 123021021211331 in words is "one hundred twenty-three trillion, twenty-one billion, twenty-one million, two hundred eleven thousand, three hundred thirty-one".