21032231330021 has 4 divisors (see below), whose sum is σ = 21388709827200. Its totient is φ = 20675752832844.

The previous prime is 21032231330017. The next prime is 21032231330023. The reversal of 21032231330021 is 12003313223012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21032231330021 - 2² = 21032231330017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032231330023) 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, 178239248501 + ... + 178239248618.

It is an arithmetic number, because the mean of its divisors is an integer number (5347177456800).

Almost surely, 2^{21032231330021} is an apocalyptic number.

It is an amenable number.

21032231330021 is a deficient number, since it is larger than the sum of its proper divisors (356478497179).

21032231330021 is an equidigital number, since it uses as much as digits as its factorization.

21032231330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356478497178.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21032231330021 its reverse (12003313223012), we get a palindrome (33035544553033).

The spelling of 21032231330021 in words is "twenty-one trillion, thirty-two billion, two hundred thirty-one million, three hundred thirty thousand, twenty-one".