21641007222999 has 24 divisors (see below), whose sum is σ = 32417730497152. Its totient is φ = 14427005032440.

The previous prime is 21641007222997. The next prime is 21641007223001. The reversal of 21641007222999 is 99922270014612.

It is a happy number.

21641007222999 is a `hidden beast` number, since 2 + 164 + 100 + 72 + 229 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (21641007222997) and next prime (21641007223001).

It is not a de Polignac number, because 21641007222999 - 2¹ = 21641007222997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21641007222997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9749904 + ... + 11761914.

Almost surely, 2^{21641007222999} is an apocalyptic number.

21641007222999 is a deficient number, since it is larger than the sum of its proper divisors (10776723274153).

21641007222999 is an equidigital number, since it uses as much as digits as its factorization.

21641007222999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056289 (or 2056277 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 21641007222999 in words is "twenty-one trillion, six hundred forty-one billion, seven million, two hundred twenty-two thousand, nine hundred ninety-nine".