11221211052 has 36 divisors (see below), whose sum is σ = 28382503240. Its totient is φ = 3738059712.

The previous prime is 11221211041. The next prime is 11221211101. The reversal of 11221211052 is 25011212211.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38938 + ... + 154785.

Almost surely, 2^11221211052 is an apocalyptic number.

11221211052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11221211052 is an abundant number, since it is smaller than the sum of its proper divisors (17161292188).

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

11221211052 is a wasteful number, since it uses less digits than its factorization.

11221211052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195342 (or 195337 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 11221211052 its reverse (25011212211), we get a palindrome (36232423263).

The spelling of 11221211052 in words is "eleven billion, two hundred twenty-one million, two hundred eleven thousand, fifty-two".