21120311199 has 64 divisors (see below), whose sum is σ = 32569084800. Its totient is φ = 12058951680.

The previous prime is 21120311171. The next prime is 21120311203. The reversal of 21120311199 is 99111302112.

It is a de Polignac number, because none of the positive numbers 2^k-21120311199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120311159) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22444069 + ... + 22445009.

It is an arithmetic number, because the mean of its divisors is an integer number (508891950).

Almost surely, 2^21120311199 is an apocalyptic number.

21120311199 is a deficient number, since it is larger than the sum of its proper divisors (11448773601).

21120311199 is a wasteful number, since it uses less digits than its factorization.

21120311199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420.

The product of its (nonzero) digits is 972, while the sum is 30.

The spelling of 21120311199 in words is "twenty-one billion, one hundred twenty million, three hundred eleven thousand, one hundred ninety-nine".