21130331333021 has 16 divisors (see below), whose sum is σ = 21268668492288. Its totient is φ = 20992426560000.

The previous prime is 21130331332951. The next prime is 21130331333029. The reversal of 21130331333021 is 12033313303112.

It is a cyclic number.

It is not a de Polignac number, because 21130331333021 - 2¹⁴ = 21130331316637 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 (21130331333029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221441921 + ... + 221537321.

It is an arithmetic number, because the mean of its divisors is an integer number (1329291780768).

Almost surely, 2^{21130331333021} is an apocalyptic number.

It is an amenable number.

21130331333021 is a deficient number, since it is larger than the sum of its proper divisors (138337159267).

21130331333021 is a wasteful number, since it uses less digits than its factorization.

21130331333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97652.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21130331333021 its reverse (12033313303112), we get a palindrome (33163644636133).

The spelling of 21130331333021 in words is "twenty-one trillion, one hundred thirty billion, three hundred thirty-one million, three hundred thirty-three thousand, twenty-one".