21222740115 has 12 divisors (see below), whose sum is σ = 36786082944. Its totient is φ = 11318794704.

The previous prime is 21222740101. The next prime is 21222740117. The reversal of 21222740115 is 51104722212.

It is a happy number.

21222740115 is a `hidden beast` number, since 21 + 2 + 227 + 401 + 15 = 666.

It is not a de Polignac number, because 21222740115 - 2⁵ = 21222740083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222740117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235808179 + ... + 235808268.

It is an arithmetic number, because the mean of its divisors is an integer number (3065506912).

Almost surely, 2^21222740115 is an apocalyptic number.

21222740115 is a deficient number, since it is larger than the sum of its proper divisors (15563342829).

21222740115 is a wasteful number, since it uses less digits than its factorization.

21222740115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471616458 (or 471616455 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The spelling of 21222740115 in words is "twenty-one billion, two hundred twenty-two million, seven hundred forty thousand, one hundred fifteen".