21160424621 has 8 divisors (see below), whose sum is σ = 25456150080. Its totient is φ = 17182901088.

The previous prime is 21160424573. The next prime is 21160424639. The reversal of 21160424621 is 12642406112.

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

It is a cyclic number.

It is not a de Polignac number, because 21160424621 - 2³⁰ = 20086682797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160424651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79550336 + ... + 79550601.

It is an arithmetic number, because the mean of its divisors is an integer number (3182018760).

Almost surely, 2^21160424621 is an apocalyptic number.

It is an amenable number.

21160424621 is a deficient number, since it is larger than the sum of its proper divisors (4295725459).

21160424621 is a wasteful number, since it uses less digits than its factorization.

21160424621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159100963.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 21160424621 in words is "twenty-one billion, one hundred sixty million, four hundred twenty-four thousand, six hundred twenty-one".