21012023002331 has 4 divisors (see below), whose sum is σ = 21029203725552. Its totient is φ = 20994842279112.

The previous prime is 21012023002307. The next prime is 21012023002337. The reversal of 21012023002331 is 13320032021012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21012023002331 - 2³⁰ = 21010949260507 is a prime.

It is a super-2 number, since 2×21012023002331² (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 (21012023002337) 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 in 3 ways as a sum of consecutive naturals, for example, 8590359776 + ... + 8590362221.

It is an arithmetic number, because the mean of its divisors is an integer number (5257300931388).

Almost surely, 2^{21012023002331} is an apocalyptic number.

21012023002331 is a deficient number, since it is larger than the sum of its proper divisors (17180723221).

21012023002331 is a wasteful number, since it uses less digits than its factorization.

21012023002331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17180723220.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21012023002331 its reverse (13320032021012), we get a palindrome (34332055023343).

The spelling of 21012023002331 in words is "twenty-one trillion, twelve billion, twenty-three million, two thousand, three hundred thirty-one".