20211122031 has 32 divisors (see below), whose sum is σ = 27825251328. Its totient is φ = 13042391040.

The previous prime is 20211122021. The next prime is 20211122033. The reversal of 20211122031 is 13022111202.

It is not a de Polignac number, because 20211122031 - 2²³ = 20202733423 is a prime.

It is a super-2 number, since 2×20211122031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20211122031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211122033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9351591 + ... + 9353751.

It is an arithmetic number, because the mean of its divisors is an integer number (869539104).

Almost surely, 2^20211122031 is an apocalyptic number.

20211122031 is a deficient number, since it is larger than the sum of its proper divisors (7614129297).

20211122031 is a wasteful number, since it uses less digits than its factorization.

20211122031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20211122031 its reverse (13022111202), we get a palindrome (33233233233).

The spelling of 20211122031 in words is "twenty billion, two hundred eleven million, one hundred twenty-two thousand, thirty-one".