1211747111125 has 16 divisors (see below), whose sum is σ = 1547429247936. Its totient is φ = 946853552400.

The previous prime is 1211747111119. The next prime is 1211747111143. The reversal of 1211747111125 is 5211117471121.

It is a de Polignac number, because none of the positive numbers 2^k-1211747111125 is a prime.

It is a super-2 number, since 2×1211747111125² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

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, 112715287 + ... + 112726036.

It is an arithmetic number, because the mean of its divisors is an integer number (96714327996).

Almost surely, 2^{1211747111125} is an apocalyptic number.

It is an amenable number.

1211747111125 is a deficient number, since it is larger than the sum of its proper divisors (335682136811).

1211747111125 is an equidigital number, since it uses as much as digits as its factorization.

1211747111125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225441381 (or 225441371 counting only the distinct ones).

The product of its digits is 3920, while the sum is 34.

The spelling of 1211747111125 in words is "one trillion, two hundred eleven billion, seven hundred forty-seven million, one hundred eleven thousand, one hundred twenty-five".