21222202012111 has 32 divisors (see below), whose sum is σ = 22535640686592. Its totient is φ = 19953408192480.

The previous prime is 21222202012093. The next prime is 21222202012129. The reversal of 21222202012111 is 11121020222212.

It is an interprime number because it is at equal distance from previous prime (21222202012093) and next prime (21222202012129).

It is a cyclic number.

It is not a de Polignac number, because 21222202012111 - 2⁵ = 21222202012079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222202012171) 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, 212335596 + ... + 212435518.

It is an arithmetic number, because the mean of its divisors is an integer number (704238771456).

Almost surely, 2^{21222202012111} is an apocalyptic number.

21222202012111 is a deficient number, since it is larger than the sum of its proper divisors (1313438674481).

21222202012111 is a wasteful number, since it uses less digits than its factorization.

21222202012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100843.

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

Adding to 21222202012111 its reverse (11121020222212), we get a palindrome (32343222234323).

The spelling of 21222202012111 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred two million, twelve thousand, one hundred eleven".