1215112212 has 24 divisors (see below), whose sum is σ = 3150291200. Its totient is φ = 405037368.

The previous prime is 1215112211. The next prime is 1215112219. The reversal of 1215112212 is 2122115121.

1215112212 is a `hidden beast` number, since 121 + 511 + 22 + 12 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215112211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5625412 + ... + 5625627.

Almost surely, 2^1215112212 is an apocalyptic number.

1215112212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215112212 is an abundant number, since it is smaller than the sum of its proper divisors (1935178988).

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

1215112212 is a wasteful number, since it uses less digits than its factorization.

1215112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11251052 (or 11251044 counting only the distinct ones).

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

The square root of 1215112212 is about 34858.4596905830. The cubic root of 1215112212 is about 1067.1008402215.

Adding to 1215112212 its reverse (2122115121), we get a palindrome (3337227333).

The spelling of 1215112212 in words is "one billion, two hundred fifteen million, one hundred twelve thousand, two hundred twelve".