31231202132201 has 4 divisors (see below), whose sum is σ = 31337793266052. Its totient is φ = 31124610998352.

The previous prime is 31231202132171. The next prime is 31231202132267. The reversal of 31231202132201 is 10223120213213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13825576412176 + 17405625720025 = 3718276^2 + 4172005^2 .

It is a cyclic number.

It is not a de Polignac number, because 31231202132201 - 2²² = 31231197937897 is a prime.

It is a super-2 number, since 2×31231202132201² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231202134201) 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, 53295566486 + ... + 53295567071.

It is an arithmetic number, because the mean of its divisors is an integer number (7834448316513).

Almost surely, 2^{31231202132201} is an apocalyptic number.

It is an amenable number.

31231202132201 is a deficient number, since it is larger than the sum of its proper divisors (106591133851).

31231202132201 is a wasteful number, since it uses less digits than its factorization.

31231202132201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106591133850.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31231202132201 its reverse (10223120213213), we get a palindrome (41454322345414).

The spelling of 31231202132201 in words is "thirty-one trillion, two hundred thirty-one billion, two hundred two million, one hundred thirty-two thousand, two hundred one".