21020323001 has 8 divisors (see below), whose sum is σ = 21943707840. Its totient is φ = 20097726352.

The previous prime is 21020322989. The next prime is 21020323021. The reversal of 21020323001 is 10032302012.

It is a happy number.

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 21020323001 - 2²⁶ = 20953214137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020323021) 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, 142211 + ... + 249528.

It is an arithmetic number, because the mean of its divisors is an integer number (2742963480).

Almost surely, 2^21020323001 is an apocalyptic number.

It is an amenable number.

21020323001 is a deficient number, since it is larger than the sum of its proper divisors (923384839).

21020323001 is a wasteful number, since it uses less digits than its factorization.

21020323001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394095.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21020323001 its reverse (10032302012), we get a palindrome (31052625013).

The spelling of 21020323001 in words is "twenty-one billion, twenty million, three hundred twenty-three thousand, one".