31002201001 has 4 divisors (see below), whose sum is σ = 31004340052. Its totient is φ = 31000061952.

The previous prime is 31002200941. The next prime is 31002201007. The reversal of 31002201001 is 10010220013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10010220013 = 31 ⋅322910323.

It can be written as a sum of positive squares in 2 ways, for example, as 3736265625 + 27265935376 = 61125^2 + 165124^2 .

It is a cyclic number.

It is not a de Polignac number, because 31002201001 - 2²⁷ = 30867983273 is a prime.

It is a super-2 number, since 2×31002201001² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31002201007) 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, 1047636 + ... + 1076821.

It is an arithmetic number, because the mean of its divisors is an integer number (7751085013).

Almost surely, 2^31002201001 is an apocalyptic number.

It is an amenable number.

31002201001 is a deficient number, since it is larger than the sum of its proper divisors (2139051).

31002201001 is a wasteful number, since it uses less digits than its factorization.

31002201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139050.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 31002201001 its reverse (10010220013), we get a palindrome (41012421014).

The spelling of 31002201001 in words is "thirty-one billion, two million, two hundred one thousand, one".