21099255298 has 16 divisors (see below), whose sum is σ = 36027187776. Its totient is φ = 9173589040.

The previous prime is 21099255293. The next prime is 21099255319. The reversal of 21099255298 is 89255299012.

It is not an unprimeable number, because it can be changed into a prime (21099255293) 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, 20848561 + ... + 20849572.

It is an arithmetic number, because the mean of its divisors is an integer number (2251699236).

Almost surely, 2^21099255298 is an apocalyptic number.

21099255298 is a deficient number, since it is larger than the sum of its proper divisors (14927932478).

21099255298 is a wasteful number, since it uses less digits than its factorization.

21099255298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41698169.

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 21099255298 in words is "twenty-one billion, ninety-nine million, two hundred fifty-five thousand, two hundred ninety-eight".