21132210301021 has 2 divisors, whose sum is σ = 21132210301022. Its totient is φ = 21132210301020.

The previous prime is 21132210301019. The next prime is 21132210301051. The reversal of 21132210301021 is 12010301223112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18535487541796 + 2596722759225 = 4305286^2 + 1611435^2 .

It is a cyclic number.

It is not a de Polignac number, because 21132210301021 - 2¹ = 21132210301019 is a prime.

Together with 21132210301019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21132210301021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132210301051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566105150510 + 10566105150511.

It is an arithmetic number, because the mean of its divisors is an integer number (10566105150511).

Almost surely, 2^{21132210301021} is an apocalyptic number.

It is an amenable number.

21132210301021 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132210301021 is an equidigital number, since it uses as much as digits as its factorization.

21132210301021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21132210301021 its reverse (12010301223112), we get a palindrome (33142511524133).

The spelling of 21132210301021 in words is "twenty-one trillion, one hundred thirty-two billion, two hundred ten million, three hundred one thousand, twenty-one".