20112231221331 has 16 divisors (see below), whose sum is σ = 27681481175040. Its totient is φ = 12975571791360.

The previous prime is 20112231221323. The next prime is 20112231221371. The reversal of 20112231221331 is 13312213221102.

It is not a de Polignac number, because 20112231221331 - 2³ = 20112231221323 is a prime.

It is a super-2 number, since 2×20112231221331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20112231221371) 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, 27536646 + ... + 28257588.

It is an arithmetic number, because the mean of its divisors is an integer number (1730092573440).

Almost surely, 2^{20112231221331} is an apocalyptic number.

20112231221331 is a deficient number, since it is larger than the sum of its proper divisors (7569249953709).

20112231221331 is a wasteful number, since it uses less digits than its factorization.

20112231221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020946.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20112231221331 its reverse (13312213221102), we get a palindrome (33424444442433).

The spelling of 20112231221331 in words is "twenty trillion, one hundred twelve billion, two hundred thirty-one million, two hundred twenty-one thousand, three hundred thirty-one".