1215122512130 has 16 divisors (see below), whose sum is σ = 2187237432384. Its totient is φ = 486045246960.

The previous prime is 1215122512111. The next prime is 1215122512157. The reversal of 1215122512130 is 312152215121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215122512130.

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, 1156409 + ... + 1941011.

It is an arithmetic number, because the mean of its divisors is an integer number (136702339524).

Almost surely, 2^{1215122512130} is an apocalyptic number.

1215122512130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215122512130 is a deficient number, since it is larger than the sum of its proper divisors (972114920254).

1215122512130 is a wasteful number, since it uses less digits than its factorization.

1215122512130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939481.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 1215122512130 its reverse (312152215121), we get a palindrome (1527274727251).

The spelling of 1215122512130 in words is "one trillion, two hundred fifteen billion, one hundred twenty-two million, five hundred twelve thousand, one hundred thirty".