21002011201898 has 32 divisors (see below), whose sum is σ = 31929074622720. Its totient is φ = 10359217440000.

The previous prime is 21002011201861. The next prime is 21002011201909. The reversal of 21002011201898 is 89810211020012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1164117758 + ... + 1164135798.

It is an arithmetic number, because the mean of its divisors is an integer number (997783581960).

Almost surely, 2^{21002011201898} is an apocalyptic number.

21002011201898 is a deficient number, since it is larger than the sum of its proper divisors (10927063420822).

21002011201898 is a wasteful number, since it uses less digits than its factorization.

21002011201898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24014.

The product of its (nonzero) digits is 4608, while the sum is 35.

The spelling of 21002011201898 in words is "twenty-one trillion, two billion, eleven million, two hundred one thousand, eight hundred ninety-eight".