31201243201 has 4 divisors (see below), whose sum is σ = 31926853552. Its totient is φ = 30475632852.

The previous prime is 31201243163. The next prime is 31201243217. The reversal of 31201243201 is 10234210213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201243201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31201243291) 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, 362805111 + ... + 362805196.

It is an arithmetic number, because the mean of its divisors is an integer number (7981713388).

Almost surely, 2^31201243201 is an apocalyptic number.

It is an amenable number.

31201243201 is a deficient number, since it is larger than the sum of its proper divisors (725610351).

31201243201 is an equidigital number, since it uses as much as digits as its factorization.

31201243201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725610350.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31201243201 its reverse (10234210213), we get a palindrome (41435453414).

The spelling of 31201243201 in words is "thirty-one billion, two hundred one million, two hundred forty-three thousand, two hundred one".