21031010232330 has 64 divisors (see below), whose sum is σ = 57698928967680. Its totient is φ = 4805932025664.

The previous prime is 21031010232319. The next prime is 21031010232343. The reversal of 21031010232330 is 3323201013012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21031010232297 and 21031010232306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11166484 + ... + 12913263.

It is an arithmetic number, because the mean of its divisors is an integer number (901545765120).

Almost surely, 2^{21031010232330} is an apocalyptic number.

21031010232330 is an abundant number, since it is smaller than the sum of its proper divisors (36667918735350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21031010232330 is a wasteful number, since it uses less digits than its factorization.

21031010232330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24083923.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21031010232330 its reverse (3323201013012), we get a palindrome (24354211245342).

The spelling of 21031010232330 in words is "twenty-one trillion, thirty-one billion, ten million, two hundred thirty-two thousand, three hundred thirty".