20110122331 has 16 divisors (see below), whose sum is σ = 21802511808. Its totient is φ = 18438912000.

The previous prime is 20110122317. The next prime is 20110122343. The reversal of 20110122331 is 13322101102.

It is a cyclic number.

It is not a de Polignac number, because 20110122331 - 2⁵ = 20110122299 is a prime.

It is a super-2 number, since 2×20110122331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110122031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1248330 + ... + 1264336.

It is an arithmetic number, because the mean of its divisors is an integer number (1362656988).

Almost surely, 2^20110122331 is an apocalyptic number.

20110122331 is a deficient number, since it is larger than the sum of its proper divisors (1692389477).

20110122331 is a wasteful number, since it uses less digits than its factorization.

20110122331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16662.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20110122331 its reverse (13322101102), we get a palindrome (33432223433).

The spelling of 20110122331 in words is "twenty billion, one hundred ten million, one hundred twenty-two thousand, three hundred thirty-one".