21244117522 has 4 divisors (see below), whose sum is σ = 31866176286. Its totient is φ = 10622058760.

The previous prime is 21244117483. The next prime is 21244117529. The reversal of 21244117522 is 22571144212.

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

It can be written as a sum of positive squares in only one way, i.e., 19057526401 + 2186591121 = 138049^2 + 46761^2 .

It is not an unprimeable number, because it can be changed into a prime (21244117529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5311029379 + ... + 5311029382.

Almost surely, 2^21244117522 is an apocalyptic number.

21244117522 is a deficient number, since it is larger than the sum of its proper divisors (10622058764).

21244117522 is a wasteful number, since it uses less digits than its factorization.

21244117522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10622058763.

The product of its digits is 8960, while the sum is 31.

The spelling of 21244117522 in words is "twenty-one billion, two hundred forty-four million, one hundred seventeen thousand, five hundred twenty-two".