21221201021199 has 32 divisors (see below), whose sum is σ = 28540083096576. Its totient is φ = 14025182196480.

The previous prime is 21221201021183. The next prime is 21221201021203. The reversal of 21221201021199 is 99112010212212.

It is not a de Polignac number, because 21221201021199 - 2⁴ = 21221201021183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221201721199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1920986694 + ... + 1920997740.

It is an arithmetic number, because the mean of its divisors is an integer number (891877596768).

Almost surely, 2^{21221201021199} is an apocalyptic number.

21221201021199 is a deficient number, since it is larger than the sum of its proper divisors (7318882075377).

21221201021199 is a wasteful number, since it uses less digits than its factorization.

21221201021199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17095.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 21221201021199 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred one million, twenty-one thousand, one hundred ninety-nine".