123011131021010 has 64 divisors (see below), whose sum is σ = 232260085283328. Its totient is φ = 46852496688384.

The previous prime is 123011131020991. The next prime is 123011131021063. The reversal of 123011131021010 is 10120131110321.

It is a super-2 number, since 2×123011131021010² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123011131021010.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 238977137 + ... + 239491323.

It is an arithmetic number, because the mean of its divisors is an integer number (3629063832552).

Almost surely, 2^{123011131021010} is an apocalyptic number.

123011131021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123011131021010 is a deficient number, since it is larger than the sum of its proper divisors (109248954262318).

123011131021010 is a wasteful number, since it uses less digits than its factorization.

123011131021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528035.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 123011131021010 its reverse (10120131110321), we get a palindrome (133131262131331).

The spelling of 123011131021010 in words is "one hundred twenty-three trillion, eleven billion, one hundred thirty-one million, twenty-one thousand, ten".