1215126115870 has 32 divisors (see below), whose sum is σ = 2190428303616. Its totient is φ = 485339500800.

The previous prime is 1215126115837. The next prime is 1215126116027. The reversal of 1215126115870 is 785116215121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22736580 + ... + 22789960.

It is an arithmetic number, because the mean of its divisors is an integer number (68450884488).

Almost surely, 2^{1215126115870} is an apocalyptic number.

1215126115870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215126115870 is a deficient number, since it is larger than the sum of its proper divisors (975302187746).

1215126115870 is a wasteful number, since it uses less digits than its factorization.

1215126115870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56676.

The product of its (nonzero) digits is 33600, while the sum is 40.

The spelling of 1215126115870 in words is "one trillion, two hundred fifteen billion, one hundred twenty-six million, one hundred fifteen thousand, eight hundred seventy".