21160221158 has 4 divisors (see below), whose sum is σ = 31740331740. Its totient is φ = 10580110578.

The previous prime is 21160221151. The next prime is 21160221161. The reversal of 21160221158 is 85112206112.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21160221158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160221151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5290055288 + ... + 5290055291.

It is an arithmetic number, because the mean of its divisors is an integer number (7935082935).

Almost surely, 2^21160221158 is an apocalyptic number.

21160221158 is a deficient number, since it is larger than the sum of its proper divisors (10580110582).

21160221158 is a wasteful number, since it uses less digits than its factorization.

21160221158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10580110581.

The product of its (nonzero) digits is 1920, while the sum is 29.

The spelling of 21160221158 in words is "twenty-one billion, one hundred sixty million, two hundred twenty-one thousand, one hundred fifty-eight".