21022112226 has 16 divisors (see below), whose sum is σ = 42076556928. Its totient is φ = 7001982000.

The previous prime is 21022112213. The next prime is 21022112227. The reversal of 21022112226 is 62221122012.

It is not an unprimeable number, because it can be changed into a prime (21022112227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1338730 + ... + 1354341.

It is an arithmetic number, because the mean of its divisors is an integer number (2629784808).

Almost surely, 2^21022112226 is an apocalyptic number.

21022112226 is an abundant number, since it is smaller than the sum of its proper divisors (21054444702).

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

21022112226 is a wasteful number, since it uses less digits than its factorization.

21022112226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694377.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21022112226 its reverse (62221122012), we get a palindrome (83243234238).

The spelling of 21022112226 in words is "twenty-one billion, twenty-two million, one hundred twelve thousand, two hundred twenty-six".