21103210230 has 32 divisors (see below), whose sum is σ = 50660757504. Its totient is φ = 5626072416.

The previous prime is 21103210213. The next prime is 21103210273. The reversal of 21103210230 is 3201230112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30349 + ... + 207671.

It is an arithmetic number, because the mean of its divisors is an integer number (1583148672).

Almost surely, 2^21103210230 is an apocalyptic number.

21103210230 is an abundant number, since it is smaller than the sum of its proper divisors (29557547274).

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

21103210230 is a wasteful number, since it uses less digits than its factorization.

21103210230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181300.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21103210230 its reverse (3201230112), we get a palindrome (24304440342).

The spelling of 21103210230 in words is "twenty-one billion, one hundred three million, two hundred ten thousand, two hundred thirty".