31011120001 has 4 divisors (see below), whose sum is σ = 31014009904. Its totient is φ = 31008230100.

The previous prime is 31011119987. The next prime is 31011120013. The reversal of 31011120001 is 10002111013.

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 31011120001 - 2¹⁷ = 31010988929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31011120001.

It is not an unprimeable number, because it can be changed into a prime (31011120031) 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, 1428795 + ... + 1450336.

It is an arithmetic number, because the mean of its divisors is an integer number (7753502476).

Almost surely, 2^31011120001 is an apocalyptic number.

It is an amenable number.

31011120001 is a deficient number, since it is larger than the sum of its proper divisors (2889903).

31011120001 is a wasteful number, since it uses less digits than its factorization.

31011120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889902.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 31011120001 its reverse (10002111013), we get a palindrome (41013231014).

The spelling of 31011120001 in words is "thirty-one billion, eleven million, one hundred twenty thousand, one".