21303122021001 has 24 divisors (see below), whose sum is σ = 31474829674184. Its totient is φ = 13880284104960.

The previous prime is 21303122020991. The next prime is 21303122021011. The reversal of 21303122021001 is 10012022130312.

21303122021001 is a `hidden beast` number, since 21 + 30 + 312 + 202 + 100 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21303122020991) and next prime (21303122021011).

It can be written as a sum of positive squares in 4 ways, for example, as 1651677350976 + 19651444670025 = 1285176^2 + 4432995^2 .

It is not a de Polignac number, because 21303122021001 - 2⁵ = 21303122020969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303122021011) 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, 123491836 + ... + 123664221.

Almost surely, 2^{21303122021001} is an apocalyptic number.

It is an amenable number.

21303122021001 is a deficient number, since it is larger than the sum of its proper divisors (10171707653183).

21303122021001 is a wasteful number, since it uses less digits than its factorization.

21303122021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247156281 (or 247156278 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21303122021001 its reverse (10012022130312), we get a palindrome (31315144151313).

The spelling of 21303122021001 in words is "twenty-one trillion, three hundred three billion, one hundred twenty-two million, twenty-one thousand, one".