31000021340311 has 8 divisors (see below), whose sum is σ = 32614392921264. Its totient is φ = 29426519926080.

The previous prime is 31000021340273. The next prime is 31000021340357. The reversal of 31000021340311 is 11304312000013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31000021340311 - 2²¹ = 31000019243159 is a prime.

It is a super-2 number, since 2×31000021340311² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000021340381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10217540125 + ... + 10217543158.

It is an arithmetic number, because the mean of its divisors is an integer number (4076799115158).

Almost surely, 2^{31000021340311} is an apocalyptic number.

31000021340311 is a deficient number, since it is larger than the sum of its proper divisors (1614371580953).

31000021340311 is a wasteful number, since it uses less digits than its factorization.

31000021340311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20435083361.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31000021340311 its reverse (11304312000013), we get a palindrome (42304333340324).

The spelling of 31000021340311 in words is "thirty-one trillion, twenty-one million, three hundred forty thousand, three hundred eleven".