31020122201 has 4 divisors (see below), whose sum is σ = 31159226112. Its totient is φ = 30881018292.

The previous prime is 31020122191. The next prime is 31020122219. The reversal of 31020122201 is 10222102013.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10222102013 = 367 ⋅27853139.

It is a cyclic number.

It is not a de Polignac number, because 31020122201 - 2¹⁰ = 31020121177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31020122261) 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, 69551621 + ... + 69552066.

It is an arithmetic number, because the mean of its divisors is an integer number (7789806528).

Almost surely, 2^31020122201 is an apocalyptic number.

It is an amenable number.

31020122201 is a deficient number, since it is larger than the sum of its proper divisors (139103911).

31020122201 is a wasteful number, since it uses less digits than its factorization.

31020122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139103910.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31020122201 its reverse (10222102013), we get a palindrome (41242224214).

The spelling of 31020122201 in words is "thirty-one billion, twenty million, one hundred twenty-two thousand, two hundred one".