21002021302319 has 4 divisors (see below), whose sum is σ = 21002040357480. Its totient is φ = 21002002247160.

The previous prime is 21002021302259. The next prime is 21002021302331. The reversal of 21002021302319 is 91320312020012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002021302319 is a prime.

It is a super-2 number, since 2×21002021302319² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002021308319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7765724 + ... + 10114865.

It is an arithmetic number, because the mean of its divisors is an integer number (5250510089370).

Almost surely, 2^{21002021302319} is an apocalyptic number.

21002021302319 is a deficient number, since it is larger than the sum of its proper divisors (19055161).

21002021302319 is a wasteful number, since it uses less digits than its factorization.

21002021302319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19055160.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 21002021302319 in words is "twenty-one trillion, two billion, twenty-one million, three hundred two thousand, three hundred nineteen".