31001000001011 has 4 divisors (see below), whose sum is σ = 31038668288592. Its totient is φ = 30963331713432.

The previous prime is 31001000000989. The next prime is 31001000001053. The reversal of 31001000001011 is 11010000010013.

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

It is a cyclic number.

It is not a de Polignac number, because 31001000001011 - 2³⁴ = 30983820131827 is a prime.

It is a super-2 number, since 2×31001000001011² (a number of 28 digits) contains 22 as substring.

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 31001000001011.

It is not an unprimeable number, because it can be changed into a prime (31001000001091) 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, 18834142556 + ... + 18834144201.

It is an arithmetic number, because the mean of its divisors is an integer number (7759667072148).

Almost surely, 2^{31001000001011} is an apocalyptic number.

31001000001011 is a deficient number, since it is larger than the sum of its proper divisors (37668287581).

31001000001011 is an equidigital number, since it uses as much as digits as its factorization.

31001000001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37668287580.

The product of its (nonzero) digits is 3, while the sum is 8.

Adding to 31001000001011 its reverse (11010000010013), we get a palindrome (42011000011024).

The spelling of 31001000001011 in words is "thirty-one trillion, one billion, one thousand, eleven".