21234444303021 has 32 divisors (see below), whose sum is σ = 30501255905280. Its totient is φ = 13102001404800.

The previous prime is 21234444303013. The next prime is 21234444303029. The reversal of 21234444303021 is 12030344443212.

It is an interprime number because it is at equal distance from previous prime (21234444303013) and next prime (21234444303029).

It is not a de Polignac number, because 21234444303021 - 2³ = 21234444303013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234444303029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13295476 + ... + 14806706.

It is an arithmetic number, because the mean of its divisors is an integer number (953164247040).

Almost surely, 2^{21234444303021} is an apocalyptic number.

It is an amenable number.

21234444303021 is a deficient number, since it is larger than the sum of its proper divisors (9266811602259).

21234444303021 is a wasteful number, since it uses less digits than its factorization.

21234444303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517857.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 21234444303021 its reverse (12030344443212), we get a palindrome (33264788746233).

The spelling of 21234444303021 in words is "twenty-one trillion, two hundred thirty-four billion, four hundred forty-four million, three hundred three thousand, twenty-one".