1251125212 has 12 divisors (see below), whose sum is σ = 2217184480. Its totient is φ = 617643936.

The previous prime is 1251125191. The next prime is 1251125219. The reversal of 1251125212 is 2125211521.

It is a happy number.

It is a super-2 number, since 2×1251125212² = 3130628592204089888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251125219) 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, 1979313 + ... + 1979944.

Almost surely, 2^1251125212 is an apocalyptic number.

It is an amenable number.

1251125212 is a deficient number, since it is larger than the sum of its proper divisors (966059268).

1251125212 is a wasteful number, since it uses less digits than its factorization.

1251125212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959340 (or 3959338 counting only the distinct ones).

The product of its digits is 400, while the sum is 22.

The square root of 1251125212 is about 35371.2483805703. The cubic root of 1251125212 is about 1077.5404741805.

Adding to 1251125212 its reverse (2125211521), we get a palindrome (3376336733).

The spelling of 1251125212 in words is "one billion, two hundred fifty-one million, one hundred twenty-five thousand, two hundred twelve".