1211053965185 has 48 divisors (see below), whose sum is σ = 1492294422528. Its totient is φ = 943430976000.

The previous prime is 1211053965181. The next prime is 1211053965241. The reversal of 1211053965185 is 5815693501121.

It is not a de Polignac number, because 1211053965185 - 2² = 1211053965181 is a prime.

It is a super-2 number, since 2×1211053965185² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211053965181) 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, 728233664 + ... + 728235326.

It is an arithmetic number, because the mean of its divisors is an integer number (31089467136).

Almost surely, 2^{1211053965185} is an apocalyptic number.

It is an amenable number.

1211053965185 is a deficient number, since it is larger than the sum of its proper divisors (281240457343).

1211053965185 is a wasteful number, since it uses less digits than its factorization.

1211053965185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146 (or 2073 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 47.

The spelling of 1211053965185 in words is "one trillion, two hundred eleven billion, fifty-three million, nine hundred sixty-five thousand, one hundred eighty-five".