1215031135211 has 16 divisors (see below), whose sum is σ = 1233841351680. Its totient is φ = 1196369717760.

The previous prime is 1215031135081. The next prime is 1215031135229. The reversal of 1215031135211 is 1125311305121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215031135211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215031135711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113453525 + ... + 113464233.

It is an arithmetic number, because the mean of its divisors is an integer number (77115084480).

Almost surely, 2^{1215031135211} is an apocalyptic number.

1215031135211 is a deficient number, since it is larger than the sum of its proper divisors (18810216469).

1215031135211 is a wasteful number, since it uses less digits than its factorization.

1215031135211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17494.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 1215031135211 in words is "one trillion, two hundred fifteen billion, thirty-one million, one hundred thirty-five thousand, two hundred eleven".