31313021101 has 4 divisors (see below), whose sum is σ = 31332853600. Its totient is φ = 31293188604.

The previous prime is 31313021057. The next prime is 31313021119. The reversal of 31313021101 is 10112031313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31313021101 - 2¹⁷ = 31312890029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313021401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9913881 + ... + 9917038.

It is an arithmetic number, because the mean of its divisors is an integer number (7833213400).

Almost surely, 2^31313021101 is an apocalyptic number.

It is an amenable number.

31313021101 is a deficient number, since it is larger than the sum of its proper divisors (19832499).

31313021101 is a wasteful number, since it uses less digits than its factorization.

31313021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19832498.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31313021101 its reverse (10112031313), we get a palindrome (41425052414).

The spelling of 31313021101 in words is "thirty-one billion, three hundred thirteen million, twenty-one thousand, one hundred one".