1215545214212 has 18 divisors (see below), whose sum is σ = 2474502757902. Its totient is φ = 520947948864.

The previous prime is 1215545214139. The next prime is 1215545214259. The reversal of 1215545214212 is 2124125455121.

It can be written as a sum of positive squares in only one way, i.e., 1200764490436 + 14780723776 = 1095794^2 + 121576^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3100880453 + ... + 3100880844.

It is an arithmetic number, because the mean of its divisors is an integer number (137472375439).

Almost surely, 2^{1215545214212} is an apocalyptic number.

It is an amenable number.

1215545214212 is an abundant number, since it is smaller than the sum of its proper divisors (1258957543690).

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

1215545214212 is a wasteful number, since it uses less digits than its factorization.

1215545214212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6201761315 (or 6201761306 counting only the distinct ones).

The product of its digits is 32000, while the sum is 35.

The spelling of 1215545214212 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, two hundred fourteen thousand, two hundred twelve".