11521212 has 24 divisors (see below), whose sum is σ = 27750912. Its totient is φ = 3716400.

The previous prime is 11521199. The next prime is 11521249. The reversal of 11521212 is 21212511.

11521212 is a modest number, since divided by 1212 gives 1152 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 11521191 and 11521200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15114 + ... + 15857.

It is an arithmetic number, because the mean of its divisors is an integer number (1156288).

Almost surely, 2^11521212 is an apocalyptic number.

11521212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11521212 is an abundant number, since it is smaller than the sum of its proper divisors (16229700).

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

11521212 is a wasteful number, since it uses less digits than its factorization.

11521212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31009 (or 31007 counting only the distinct ones).

The product of its digits is 40, while the sum is 15.

The square root of 11521212 is about 3394.2910894618. The cubic root of 11521212 is about 225.8565670403.

Adding to 11521212 its reverse (21212511), we get a palindrome (32733723).

The spelling of 11521212 in words is "eleven million, five hundred twenty-one thousand, two hundred twelve".