123131044021033 has 4 divisors (see below), whose sum is σ = 124350163268868. Its totient is φ = 121911924773200.

The previous prime is 123131044020983. The next prime is 123131044021061. The reversal of 123131044021033 is 330120440131321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84513308244544 + 38617735776489 = 9193112^2 + 6214317^2 .

It is a cyclic number.

It is not a de Polignac number, because 123131044021033 - 2⁹ = 123131044020521 is a prime.

It is a super-2 number, since 2×123131044021033² (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 = 123131044020992 and 123131044021010.

It is not an unprimeable number, because it can be changed into a prime (123131044001033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609559623766 + ... + 609559623967.

It is an arithmetic number, because the mean of its divisors is an integer number (31087540817217).

Almost surely, 2^{123131044021033} is an apocalyptic number.

It is an amenable number.

123131044021033 is a deficient number, since it is larger than the sum of its proper divisors (1219119247835).

123131044021033 is a wasteful number, since it uses less digits than its factorization.

123131044021033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219119247834.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 123131044021033 its reverse (330120440131321), we get a palindrome (453251484152354).

The spelling of 123131044021033 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, forty-four million, twenty-one thousand, thirty-three".