57121212 has 12 divisors (see below), whose sum is σ = 133282856. Its totient is φ = 19040400.

The previous prime is 57121151. The next prime is 57121219. The reversal of 57121212 is 21212175.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57121219) 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, 2380039 + ... + 2380062.

Almost surely, 2^57121212 is an apocalyptic number.

It is an amenable number.

57121212 is an abundant number, since it is smaller than the sum of its proper divisors (76161644).

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

57121212 is a wasteful number, since it uses less digits than its factorization.

57121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760108 (or 4760106 counting only the distinct ones).

The product of its digits is 280, while the sum is 21.

The square root of 57121212 is about 7557.8576329539. The cubic root of 57121212 is about 385.1227179495.

Adding to 57121212 its reverse (21212175), we get a palindrome (78333387).

It can be divided in two parts, 5 and 7121212, that added together give a palindrome (7121217).

The spelling of 57121212 in words is "fifty-seven million, one hundred twenty-one thousand, two hundred twelve".