1211155154013 has 32 divisors (see below), whose sum is σ = 1847520458752. Its totient is φ = 691357550400.

The previous prime is 1211155153981. The next prime is 1211155154017. The reversal of 1211155154013 is 3104515511121.

It is not a de Polignac number, because 1211155154013 - 2⁵ = 1211155153981 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 (1211155154017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99179478 + ... + 99191688.

It is an arithmetic number, because the mean of its divisors is an integer number (57735014336).

Almost surely, 2^{1211155154013} is an apocalyptic number.

It is an amenable number.

1211155154013 is a deficient number, since it is larger than the sum of its proper divisors (636365304739).

1211155154013 is a wasteful number, since it uses less digits than its factorization.

1211155154013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16825.

The product of its (nonzero) digits is 3000, while the sum is 30.

The spelling of 1211155154013 in words is "one trillion, two hundred eleven billion, one hundred fifty-five million, one hundred fifty-four thousand, thirteen".