21242140130 has 32 divisors (see below), whose sum is σ = 39909542400. Its totient is φ = 8125133632.

The previous prime is 21242140121. The next prime is 21242140193. The reversal of 21242140130 is 3104124212.

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, 961751 + ... + 983589.

It is an arithmetic number, because the mean of its divisors is an integer number (1247173200).

Almost surely, 2^21242140130 is an apocalyptic number.

21242140130 is a deficient number, since it is larger than the sum of its proper divisors (18667402270).

21242140130 is a wasteful number, since it uses less digits than its factorization.

21242140130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26098.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21242140130 its reverse (3104124212), we get a palindrome (24346264342).

The spelling of 21242140130 in words is "twenty-one billion, two hundred forty-two million, one hundred forty thousand, one hundred thirty".