20021112112222 has 128 divisors (see below), whose sum is σ = 34657826918400. Its totient is φ = 8603558498304.

The previous prime is 20021112112171. The next prime is 20021112112223. The reversal of 20021112112222 is 22221121112002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021112112222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021112112223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5673308554 + ... + 5673312082.

It is an arithmetic number, because the mean of its divisors is an integer number (270764272800).

Almost surely, 2^{20021112112222} is an apocalyptic number.

20021112112222 is a deficient number, since it is larger than the sum of its proper divisors (14636714806178).

20021112112222 is a wasteful number, since it uses less digits than its factorization.

20021112112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20021112112222 its reverse (22221121112002), we get a palindrome (42242233224224).

The spelling of 20021112112222 in words is "twenty trillion, twenty-one billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty-two".