21230221002331 has 16 divisors (see below), whose sum is σ = 23287298144256. Its totient is φ = 19194370380000.

The previous prime is 21230221002293. The next prime is 21230221002371. The reversal of 21230221002331 is 13320012203212.

It is a cyclic number.

It is not a de Polignac number, because 21230221002331 - 2⁷ = 21230221002203 is a prime.

It is a super-2 number, since 2×21230221002331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230221002371) 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, 7191616 + ... + 9704626.

It is an arithmetic number, because the mean of its divisors is an integer number (1455456134016).

Almost surely, 2^{21230221002331} is an apocalyptic number.

21230221002331 is a deficient number, since it is larger than the sum of its proper divisors (2057077141925).

21230221002331 is a wasteful number, since it uses less digits than its factorization.

21230221002331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517234.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21230221002331 its reverse (13320012203212), we get a palindrome (34550233205543).

The spelling of 21230221002331 in words is "twenty-one trillion, two hundred thirty billion, two hundred twenty-one million, two thousand, three hundred thirty-one".