11111132121 has 8 divisors (see below), whose sum is σ = 14820843360. Its totient is φ = 7404421152.

The previous prime is 11111132111. The next prime is 11111132141. The reversal of 11111132121 is 12123111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11111132121 - 2¹¹ = 11111130073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11111132121.

It is not an unprimeable number, because it can be changed into a prime (11111132101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741411 + ... + 756248.

It is an arithmetic number, because the mean of its divisors is an integer number (1852605420).

Almost surely, 2^11111132121 is an apocalyptic number.

It is an amenable number.

11111132121 is a deficient number, since it is larger than the sum of its proper divisors (3709711239).

11111132121 is a wasteful number, since it uses less digits than its factorization.

11111132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500135.

The product of its digits is 12, while the sum is 15.

Adding to 11111132121 its reverse (12123111111), we get a palindrome (23234243232).

The spelling of 11111132121 in words is "eleven billion, one hundred eleven million, one hundred thirty-two thousand, one hundred twenty-one".