20011222311031 has 32 divisors (see below), whose sum is σ = 23783895590400. Its totient is φ = 16483580196480.

The previous prime is 20011222311019. The next prime is 20011222311037. The reversal of 20011222311031 is 13011322211002.

It is a cyclic number.

It is not a de Polignac number, because 20011222311031 - 2²³ = 20011213922423 is a prime.

It is a super-2 number, since 2×20011222311031² (a number of 27 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 (20011222311037) 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, 1669905 + ... + 6543013.

It is an arithmetic number, because the mean of its divisors is an integer number (743246737200).

Almost surely, 2^{20011222311031} is an apocalyptic number.

20011222311031 is a deficient number, since it is larger than the sum of its proper divisors (3772673279369).

20011222311031 is a wasteful number, since it uses less digits than its factorization.

20011222311031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4873399.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20011222311031 its reverse (13011322211002), we get a palindrome (33022544522033).

The spelling of 20011222311031 in words is "twenty trillion, eleven billion, two hundred twenty-two million, three hundred eleven thousand, thirty-one".