21016898222 has 16 divisors (see below), whose sum is σ = 33191759760. Its totient is φ = 9953217792.

The previous prime is 21016898213. The next prime is 21016898237. The reversal of 21016898222 is 22289861012.

It is a happy number.

It is a super-2 number, since 2×21016898222² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21016898222.

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, 125438 + ... + 240350.

It is an arithmetic number, because the mean of its divisors is an integer number (2074484985).

Almost surely, 2^21016898222 is an apocalyptic number.

21016898222 is a deficient number, since it is larger than the sum of its proper divisors (12174861538).

21016898222 is a wasteful number, since it uses less digits than its factorization.

21016898222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119747.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 21016898222 in words is "twenty-one billion, sixteen million, eight hundred ninety-eight thousand, two hundred twenty-two".