11122022521 has 9 divisors (see below), whose sum is σ = 11207997381. Its totient is φ = 11036704572.

The previous prime is 11122022491. The next prime is 11122022537. The reversal of 11122022521 is 12522022111.

It is a happy number.

The square root of 11122022521 is 105461.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 11122022521 - 2²³ = 11113633913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11122022581) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17189820 + ... + 17190466.

Almost surely, 2^11122022521 is an apocalyptic number.

11122022521 is the 105461-st square number.

11122022521 is the 52731-st centered octagonal number.

It is an amenable number.

11122022521 is a deficient number, since it is larger than the sum of its proper divisors (85974860).

11122022521 is an frugal number, since it uses more digits than its factorization.

11122022521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 11122022521 its reverse (12522022111), we get a palindrome (23644044632).

The spelling of 11122022521 in words is "eleven billion, one hundred twenty-two million, twenty-two thousand, five hundred twenty-one".