21101321230 has 32 divisors (see below), whose sum is σ = 43872697440. Its totient is φ = 7221841920.

The previous prime is 21101321221. The next prime is 21101321299. The reversal of 21101321230 is 3212310112.

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, 5640195 + ... + 5643934.

It is an arithmetic number, because the mean of its divisors is an integer number (1371021795).

Almost surely, 2^21101321230 is an apocalyptic number.

21101321230 is an abundant number, since it is smaller than the sum of its proper divisors (22771376210).

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

21101321230 is a wasteful number, since it uses less digits than its factorization.

21101321230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11284164.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21101321230 its reverse (3212310112), we get a palindrome (24313631342).

The spelling of 21101321230 in words is "twenty-one billion, one hundred one million, three hundred twenty-one thousand, two hundred thirty".