21120015363 has 16 divisors (see below), whose sum is σ = 29043933696. Its totient is φ = 13643986400.

The previous prime is 21120015341. The next prime is 21120015373. The reversal of 21120015363 is 36351002112.

It is a cyclic number.

It is not a de Polignac number, because 21120015363 - 2²⁴ = 21103238147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120015373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727281 + ... + 755762.

It is an arithmetic number, because the mean of its divisors is an integer number (1815245856).

Almost surely, 2^21120015363 is an apocalyptic number.

21120015363 is a deficient number, since it is larger than the sum of its proper divisors (7923918333).

21120015363 is a wasteful number, since it uses less digits than its factorization.

21120015363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483194.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 21120015363 its reverse (36351002112), we get a palindrome (57471017475).

The spelling of 21120015363 in words is "twenty-one billion, one hundred twenty million, fifteen thousand, three hundred sixty-three".