31311100001 has 4 divisors (see below), whose sum is σ = 31323929604. Its totient is φ = 31298270400.

The previous prime is 31311099983. The next prime is 31311100003. The reversal of 31311100001 is 10000111313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20022250000 + 11288850001 = 141500^2 + 106249^2 .

It is a cyclic number.

It is not a de Polignac number, because 31311100001 - 2²² = 31306905697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311100003) 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, 6411140 + ... + 6416021.

It is an arithmetic number, because the mean of its divisors is an integer number (7830982401).

Almost surely, 2^31311100001 is an apocalyptic number.

It is an amenable number.

31311100001 is a deficient number, since it is larger than the sum of its proper divisors (12829603).

31311100001 is a wasteful number, since it uses less digits than its factorization.

31311100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12829602.

The product of its (nonzero) digits is 9, while the sum is 11.

Adding to 31311100001 its reverse (10000111313), we get a palindrome (41311211314).

The spelling of 31311100001 in words is "thirty-one billion, three hundred eleven million, one hundred thousand, one".