21201012430 has 16 divisors (see below), whose sum is σ = 41097347424. Its totient is φ = 7828066080.

The previous prime is 21201012419. The next prime is 21201012457. The reversal of 21201012430 is 3421010212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81542226 + ... + 81542485.

It is an arithmetic number, because the mean of its divisors is an integer number (2568584214).

Almost surely, 2^21201012430 is an apocalyptic number.

21201012430 is a deficient number, since it is larger than the sum of its proper divisors (19896334994).

21201012430 is a wasteful number, since it uses less digits than its factorization.

21201012430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163084731.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21201012430 its reverse (3421010212), we get a palindrome (24622022642).

The spelling of 21201012430 in words is "twenty-one billion, two hundred one million, twelve thousand, four hundred thirty".