31122121001023 has 16 divisors (see below), whose sum is σ = 33587056742400. Its totient is φ = 28667321030880.

The previous prime is 31122121000981. The next prime is 31122121001089. The reversal of 31122121001023 is 32010012122113.

It is a cyclic number.

It is not a de Polignac number, because 31122121001023 - 2⁹ = 31122121000511 is a prime.

It is a super-3 number, since 3×31122121001023³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122121001623) 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, 396365338 + ... + 396443848.

It is an arithmetic number, because the mean of its divisors is an integer number (2099191046400).

Almost surely, 2^{31122121001023} is an apocalyptic number.

31122121001023 is a deficient number, since it is larger than the sum of its proper divisors (2464935741377).

31122121001023 is a wasteful number, since it uses less digits than its factorization.

31122121001023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142662.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31122121001023 its reverse (32010012122113), we get a palindrome (63132133123136).

The spelling of 31122121001023 in words is "thirty-one trillion, one hundred twenty-two billion, one hundred twenty-one million, one thousand, twenty-three".