20000122031 has 4 divisors (see below), whose sum is σ = 20465241192. Its totient is φ = 19535002872.

The previous prime is 20000122003. The next prime is 20000122061. The reversal of 20000122031 is 13022100002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000122031 is a prime.

It is a super-2 number, since 2×20000122031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000122001) 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, 232559516 + ... + 232559601.

It is an arithmetic number, because the mean of its divisors is an integer number (5116310298).

Almost surely, 2^20000122031 is an apocalyptic number.

20000122031 is a deficient number, since it is larger than the sum of its proper divisors (465119161).

20000122031 is an equidigital number, since it uses as much as digits as its factorization.

20000122031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465119160.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20000122031 its reverse (13022100002), we get a palindrome (33022222033).

The spelling of 20000122031 in words is "twenty billion, one hundred twenty-two thousand, thirty-one".