21220031230 has 8 divisors (see below), whose sum is σ = 38196056232. Its totient is φ = 8488012488.

The previous prime is 21220031167. The next prime is 21220031249. The reversal of 21220031230 is 3213002212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061001552 + ... + 1061001571.

It is an arithmetic number, because the mean of its divisors is an integer number (4774507029).

Almost surely, 2^21220031230 is an apocalyptic number.

21220031230 is a deficient number, since it is larger than the sum of its proper divisors (16976025002).

21220031230 is a wasteful number, since it uses less digits than its factorization.

21220031230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122003130.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21220031230 its reverse (3213002212), we get a palindrome (24433033442).

The spelling of 21220031230 in words is "twenty-one billion, two hundred twenty million, thirty-one thousand, two hundred thirty".