21198299722 has 8 divisors (see below), whose sum is σ = 31814129376. Its totient is φ = 10593589932.

The previous prime is 21198299713. The next prime is 21198299723. The reversal of 21198299722 is 22799289112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21198299722² (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 21198299722.

It is not an unprimeable number, because it can be changed into a prime (21198299723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2775198 + ... + 2782825.

It is an arithmetic number, because the mean of its divisors is an integer number (3976766172).

Almost surely, 2^21198299722 is an apocalyptic number.

21198299722 is a deficient number, since it is larger than the sum of its proper divisors (10615829654).

21198299722 is a wasteful number, since it uses less digits than its factorization.

21198299722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5559932.

The product of its digits is 653184, while the sum is 52.

The spelling of 21198299722 in words is "twenty-one billion, one hundred ninety-eight million, two hundred ninety-nine thousand, seven hundred twenty-two".