11221235152 has 20 divisors (see below), whose sum is σ = 23020034436. Its totient is φ = 5280581120.

The previous prime is 11221235143. The next prime is 11221235153. The reversal of 11221235152 is 25153212211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3203107216 + 8018127936 = 56596^2 + 89544^2 .

It is a super-2 number, since 2×11221235152² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221235153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20626999 + ... + 20627542.

Almost surely, 2^11221235152 is an apocalyptic number.

It is an amenable number.

11221235152 is an abundant number, since it is smaller than the sum of its proper divisors (11798799284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221235152 is a wasteful number, since it uses less digits than its factorization.

11221235152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41254566 (or 41254560 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

Adding to 11221235152 its reverse (25153212211), we get a palindrome (36374447363).

The spelling of 11221235152 in words is "eleven billion, two hundred twenty-one million, two hundred thirty-five thousand, one hundred fifty-two".