123162261321 has 16 divisors (see below), whose sum is σ = 186934026240. Its totient is φ = 71398411920.

The previous prime is 123162261311. The next prime is 123162261323.

123162261321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 123162261321 - 2⁵ = 123162261289 is a prime.

It is a super-2 number, since 2×123162261321² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123162261323) 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, 81133801 + ... + 81135318.

It is an arithmetic number, because the mean of its divisors is an integer number (11683376640).

Almost surely, 2^123162261321 is an apocalyptic number.

123162261321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123162261321 is a deficient number, since it is larger than the sum of its proper divisors (63771764919).

123162261321 is a wasteful number, since it uses less digits than its factorization.

123162261321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162269156.

The product of its digits is 5184, while the sum is 30.

It can be divided in two parts, 123162 and 261321, that added together give a palindrome (384483).

The spelling of 123162261321 in words is "one hundred twenty-three billion, one hundred sixty-two million, two hundred sixty-one thousand, three hundred twenty-one".