11111121272 has 16 divisors (see below), whose sum is σ = 20837619600. Its totient is φ = 5554422720.

The previous prime is 11111121271. The next prime is 11111121289. The reversal of 11111121272 is 27212111111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111121271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100004 + ... + 179507.

It is an arithmetic number, because the mean of its divisors is an integer number (1302351225).

Almost surely, 2^11111121272 is an apocalyptic number.

It is an amenable number.

11111121272 is a deficient number, since it is larger than the sum of its proper divisors (9726498328).

11111121272 is a wasteful number, since it uses less digits than its factorization.

11111121272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284486 (or 284482 counting only the distinct ones).

The product of its digits is 56, while the sum is 20.

Adding to 11111121272 its reverse (27212111111), we get a palindrome (38323232383).

The spelling of 11111121272 in words is "eleven billion, one hundred eleven million, one hundred twenty-one thousand, two hundred seventy-two".