31231200011 has 48 divisors (see below), whose sum is σ = 37111979520. Its totient is φ = 26175441600.

The previous prime is 31231199959. The next prime is 31231200029. The reversal of 31231200011 is 11000213213.

It is not a de Polignac number, because 31231200011 - 2²² = 31227005707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31231200071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42607001 + ... + 42607733.

It is an arithmetic number, because the mean of its divisors is an integer number (773166240).

Almost surely, 2^31231200011 is an apocalyptic number.

31231200011 is a deficient number, since it is larger than the sum of its proper divisors (5880779509).

31231200011 is a wasteful number, since it uses less digits than its factorization.

31231200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248 (or 1237 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31231200011 its reverse (11000213213), we get a palindrome (42231413224).

The spelling of 31231200011 in words is "thirty-one billion, two hundred thirty-one million, two hundred thousand, eleven".