31020011201 has 4 divisors (see below), whose sum is σ = 31129622832. Its totient is φ = 30910399572.

The previous prime is 31020011189. The next prime is 31020011203. The reversal of 31020011201 is 10211002013.

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-31020011201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31020011203) 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, 54805391 + ... + 54805956.

It is an arithmetic number, because the mean of its divisors is an integer number (7782405708).

Almost surely, 2^31020011201 is an apocalyptic number.

It is an amenable number.

31020011201 is a deficient number, since it is larger than the sum of its proper divisors (109611631).

31020011201 is a wasteful number, since it uses less digits than its factorization.

31020011201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109611630.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31020011201 its reverse (10211002013), we get a palindrome (41231013214).

The spelling of 31020011201 in words is "thirty-one billion, twenty million, eleven thousand, two hundred one".