21001012112199 has 16 divisors (see below), whose sum is σ = 32043594251520. Its totient is φ = 11984808855360.

The previous prime is 21001012112177. The next prime is 21001012112263. The reversal of 21001012112199 is 99121121010012.

It is not a de Polignac number, because 21001012112199 - 2⁷ = 21001012112071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001012112149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657045909 + ... + 657077870.

It is an arithmetic number, because the mean of its divisors is an integer number (2002724640720).

Almost surely, 2^{21001012112199} is an apocalyptic number.

21001012112199 is a deficient number, since it is larger than the sum of its proper divisors (11042582139321).

21001012112199 is a wasteful number, since it uses less digits than its factorization.

21001012112199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314124550.

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 21001012112199 in words is "twenty-one trillion, one billion, twelve million, one hundred twelve thousand, one hundred ninety-nine".