21230001210 has 64 divisors (see below), whose sum is σ = 55905448320. Its totient is φ = 5116903680.

The previous prime is 21230001197. The next prime is 21230001257. The reversal of 21230001210 is 1210003212.

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, 128845 + ... + 243024.

It is an arithmetic number, because the mean of its divisors is an integer number (873522630).

Almost surely, 2^21230001210 is an apocalyptic number.

21230001210 is an abundant number, since it is smaller than the sum of its proper divisors (34675447110).

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

21230001210 is a wasteful number, since it uses less digits than its factorization.

21230001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372063.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21230001210 its reverse (1210003212), we get a palindrome (22440004422).

The spelling of 21230001210 in words is "twenty-one billion, two hundred thirty million, one thousand, two hundred ten".