11111552212 has 12 divisors (see below), whose sum is σ = 19711589716. Its totient is φ = 5479669440.

The previous prime is 11111552197. The next prime is 11111552233. The reversal of 11111552212 is 21225511111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3415701136 + 7695851076 = 58444^2 + 87726^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19026339 + ... + 19026922.

Almost surely, 2^11111552212 is an apocalyptic number.

It is an amenable number.

11111552212 is a deficient number, since it is larger than the sum of its proper divisors (8600037504).

11111552212 is a wasteful number, since it uses less digits than its factorization.

11111552212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38053338 (or 38053336 counting only the distinct ones).

The product of its digits is 200, while the sum is 22.

The spelling of 11111552212 in words is "eleven billion, one hundred eleven million, five hundred fifty-two thousand, two hundred twelve".