21311020298 has 16 divisors (see below), whose sum is σ = 32291892864. Its totient is φ = 10547220480.

The previous prime is 21311020253. The next prime is 21311020309. The reversal of 21311020298 is 89202011312.

It is a super-2 number, since 2×21311020298² (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 21311020298.

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, 222986 + ... + 303882.

It is an arithmetic number, because the mean of its divisors is an integer number (2018243304).

Almost surely, 2^21311020298 is an apocalyptic number.

21311020298 is a deficient number, since it is larger than the sum of its proper divisors (10980872566).

21311020298 is a wasteful number, since it uses less digits than its factorization.

21311020298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82237.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 21311020298 in words is "twenty-one billion, three hundred eleven million, twenty thousand, two hundred ninety-eight".