20112112221222 has 16 divisors (see below), whose sum is σ = 45970542220032. Its totient is φ = 5746317777480.

The previous prime is 20112112221203. The next prime is 20112112221337. The reversal of 20112112221222 is 22212221121102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239429907354 + ... + 239429907437.

It is an arithmetic number, because the mean of its divisors is an integer number (2873158888752).

Almost surely, 2^{20112112221222} is an apocalyptic number.

20112112221222 is an abundant number, since it is smaller than the sum of its proper divisors (25858429998810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20112112221222 is a wasteful number, since it uses less digits than its factorization.

20112112221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478859814803.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 20112112221222 its reverse (22212221121102), we get a palindrome (42324333342324).

The spelling of 20112112221222 in words is "twenty trillion, one hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-two".