31023201121 has 16 divisors (see below), whose sum is σ = 35638511040. Its totient is φ = 26708209920.

The previous prime is 31023201023. The next prime is 31023201127. The reversal of 31023201121 is 12110232013.

It is a cyclic number.

It is not a de Polignac number, because 31023201121 - 2⁹ = 31023200609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31023201095 and 31023201104.

It is not an unprimeable number, because it can be changed into a prime (31023201127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539661 + ... + 594373.

It is an arithmetic number, because the mean of its divisors is an integer number (2227406940).

Almost surely, 2^31023201121 is an apocalyptic number.

It is an amenable number.

31023201121 is a deficient number, since it is larger than the sum of its proper divisors (4615309919).

31023201121 is a wasteful number, since it uses less digits than its factorization.

31023201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57456.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31023201121 its reverse (12110232013), we get a palindrome (43133433134).

The spelling of 31023201121 in words is "thirty-one billion, twenty-three million, two hundred one thousand, one hundred twenty-one".