20122131111 has 8 divisors (see below), whose sum is σ = 26838897264. Its totient is φ = 13410059520.

The previous prime is 20122131109. The next prime is 20122131143. The reversal of 20122131111 is 11113122102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20122131111 - 2¹ = 20122131109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122131151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163626 + ... + 1180791.

It is an arithmetic number, because the mean of its divisors is an integer number (3354862158).

Almost surely, 2^20122131111 is an apocalyptic number.

20122131111 is a deficient number, since it is larger than the sum of its proper divisors (6716766153).

20122131111 is a wasteful number, since it uses less digits than its factorization.

20122131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347281.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 20122131111 its reverse (11113122102), we get a palindrome (31235253213).

Subtracting from 20122131111 its reverse (11113122102), we obtain a palindrome (9009009009).

The spelling of 20122131111 in words is "twenty billion, one hundred twenty-two million, one hundred thirty-one thousand, one hundred eleven".