31020123201 has 4 divisors (see below), whose sum is σ = 41360164272. Its totient is φ = 20680082132.

The previous prime is 31020123191. The next prime is 31020123241. The reversal of 31020123201 is 10232102013.

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 not a de Polignac number, because 31020123201 - 2¹⁵ = 31020090433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31020123241) 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, 5170020531 + ... + 5170020536.

It is an arithmetic number, because the mean of its divisors is an integer number (10340041068).

Almost surely, 2^31020123201 is an apocalyptic number.

It is an amenable number.

31020123201 is a deficient number, since it is larger than the sum of its proper divisors (10340041071).

31020123201 is a wasteful number, since it uses less digits than its factorization.

31020123201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10340041070.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31020123201 its reverse (10232102013), we get a palindrome (41252225214).

The spelling of 31020123201 in words is "thirty-one billion, twenty million, one hundred twenty-three thousand, two hundred one".