1215125534311 has 48 divisors (see below), whose sum is σ = 1371199733760. Its totient is φ = 1075137598080.

The previous prime is 1215125534303. The next prime is 1215125534317. The reversal of 1215125534311 is 1134355215121.

It is not a de Polignac number, because 1215125534311 - 2³ = 1215125534303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215125534317) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 551576536 + ... + 551578738.

It is an arithmetic number, because the mean of its divisors is an integer number (28566661120).

Almost surely, 2^{1215125534311} is an apocalyptic number.

1215125534311 is a deficient number, since it is larger than the sum of its proper divisors (156074199449).

1215125534311 is a wasteful number, since it uses less digits than its factorization.

1215125534311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216 (or 3203 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The spelling of 1215125534311 in words is "one trillion, two hundred fifteen billion, one hundred twenty-five million, five hundred thirty-four thousand, three hundred eleven".