21021201002099 has 8 divisors (see below), whose sum is σ = 21565899565392. Its totient is φ = 20483441274240.

The previous prime is 21021201002027. The next prime is 21021201002111. The reversal of 21021201002099 is 99020010212012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21021201002099 - 2²⁸ = 21020932566643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021201004099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1734702722 + ... + 1734714839.

It is an arithmetic number, because the mean of its divisors is an integer number (2695737445674).

Almost surely, 2^{21021201002099} is an apocalyptic number.

21021201002099 is a deficient number, since it is larger than the sum of its proper divisors (544698563293).

21021201002099 is an equidigital number, since it uses as much as digits as its factorization.

21021201002099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469417717.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 21021201002099 in words is "twenty-one trillion, twenty-one billion, two hundred one million, two thousand, ninety-nine".