21222211041136 has 20 divisors (see below), whose sum is σ = 46992038734192. Its totient is φ = 9095233303296.

The previous prime is 21222211041089. The next prime is 21222211041173. The reversal of 21222211041136 is 63114011222212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94742013465 + ... + 94742013688.

Almost surely, 2^{21222211041136} is an apocalyptic number.

It is an amenable number.

21222211041136 is an abundant number, since it is smaller than the sum of its proper divisors (25769827693056).

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

21222211041136 is a wasteful number, since it uses less digits than its factorization.

21222211041136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189484027168 (or 189484027162 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 21222211041136 its reverse (63114011222212), we get a palindrome (84336222263348).

The spelling of 21222211041136 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, forty-one thousand, one hundred thirty-six".