31140200021243 has 4 divisors (see below), whose sum is σ = 31140814919760. Its totient is φ = 31139585122728.

The previous prime is 31140200021171. The next prime is 31140200021291. The reversal of 31140200021243 is 34212000204113.

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 31140200021243 - 2⁸ = 31140200020987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31140200041243) 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, 307373288 + ... + 307474581.

It is an arithmetic number, because the mean of its divisors is an integer number (7785203729940).

Almost surely, 2^{31140200021243} is an apocalyptic number.

31140200021243 is a deficient number, since it is larger than the sum of its proper divisors (614898517).

31140200021243 is an equidigital number, since it uses as much as digits as its factorization.

31140200021243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614898516.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31140200021243 its reverse (34212000204113), we get a palindrome (65352200225356).

The spelling of 31140200021243 in words is "thirty-one trillion, one hundred forty billion, two hundred million, twenty-one thousand, two hundred forty-three".