21421122458 has 16 divisors (see below), whose sum is σ = 32544011304. Its totient is φ = 10573670400.

The previous prime is 21421122439. The next prime is 21421122467. The reversal of 21421122458 is 85422112412.

It can be written as a sum of positive squares in 4 ways, for example, as 21369469489 + 51652969 = 146183^2 + 7187^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59885 + ... + 215472.

Almost surely, 2^21421122458 is an apocalyptic number.

21421122458 is a deficient number, since it is larger than the sum of its proper divisors (11122888846).

21421122458 is a wasteful number, since it uses less digits than its factorization.

21421122458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275857.

The product of its digits is 10240, while the sum is 32.

The spelling of 21421122458 in words is "twenty-one billion, four hundred twenty-one million, one hundred twenty-two thousand, four hundred fifty-eight".