31523423303121 has 16 divisors (see below), whose sum is σ = 43265760539904. Its totient is φ = 20406526493184.

The previous prime is 31523423303107. The next prime is 31523423303131. The reversal of 31523423303121 is 12130332432513.

It is not a de Polignac number, because 31523423303121 - 2¹⁹ = 31523422778833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31523423303101) 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, 1021946041 + ... + 1021976886.

It is an arithmetic number, because the mean of its divisors is an integer number (2704110033744).

Almost surely, 2^{31523423303121} is an apocalyptic number.

It is an amenable number.

31523423303121 is a deficient number, since it is larger than the sum of its proper divisors (11742337236783).

31523423303121 is a wasteful number, since it uses less digits than its factorization.

31523423303121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043923080.

The product of its (nonzero) digits is 38880, while the sum is 33.

Adding to 31523423303121 its reverse (12130332432513), we get a palindrome (43653755735634).

The spelling of 31523423303121 in words is "thirty-one trillion, five hundred twenty-three billion, four hundred twenty-three million, three hundred three thousand, one hundred twenty-one".