21000201011999 has 32 divisors (see below), whose sum is σ = 24083604357120. Its totient is φ = 18125388943200.

The previous prime is 21000201011971. The next prime is 21000201012013. The reversal of 21000201011999 is 99911010200012.

It is not a de Polignac number, because 21000201011999 - 2¹⁶ = 21000200946463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000201011929) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 17997734 + ... + 19129004.

It is an arithmetic number, because the mean of its divisors is an integer number (752612636160).

Almost surely, 2^{21000201011999} is an apocalyptic number.

21000201011999 is a deficient number, since it is larger than the sum of its proper divisors (3083403345121).

21000201011999 is a wasteful number, since it uses less digits than its factorization.

21000201011999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131851.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 21000201011999 in words is "twenty-one trillion, two hundred one million, eleven thousand, nine hundred ninety-nine".