31023311122121 has 16 divisors (see below), whose sum is σ = 31287214227984. Its totient is φ = 30760895176704.

The previous prime is 31023311122103. The next prime is 31023311122147. The reversal of 31023311122121 is 12122111332013.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5274536916496 + 25748774205625 = 2296636^2 + 5074325^2 .

It is a cyclic number.

It is not a de Polignac number, because 31023311122121 - 2²⁶ = 31023244013257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31023311122021) 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, 44022875 + ... + 44722031.

It is an arithmetic number, because the mean of its divisors is an integer number (1955450889249).

Almost surely, 2^{31023311122121} is an apocalyptic number.

It is an amenable number.

31023311122121 is a deficient number, since it is larger than the sum of its proper divisors (263903105863).

31023311122121 is a wasteful number, since it uses less digits than its factorization.

31023311122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700220.

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

Adding to 31023311122121 its reverse (12122111332013), we get a palindrome (43145422454134).

The spelling of 31023311122121 in words is "thirty-one trillion, twenty-three billion, three hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".