21123301312198 has 16 divisors (see below), whose sum is σ = 33727329126000. Its totient is φ = 9893349873792.

The previous prime is 21123301312181. The next prime is 21123301312219. The reversal of 21123301312198 is 89121310332112.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3122897463 + ... + 3122904226.

It is an arithmetic number, because the mean of its divisors is an integer number (2107958070375).

Almost surely, 2^{21123301312198} is an apocalyptic number.

21123301312198 is a deficient number, since it is larger than the sum of its proper divisors (12604027813802).

21123301312198 is a wasteful number, since it uses less digits than its factorization.

21123301312198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6245801799.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 21123301312198 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred one million, three hundred twelve thousand, one hundred ninety-eight".