111121001121 has 16 divisors (see below), whose sum is σ = 159565049280. Its totient is φ = 68379288000.

The previous prime is 111121001099. The next prime is 111121001197. The reversal of 111121001121 is 121100121111.

It is a de Polignac number, because none of the positive numbers 2^k-111121001121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111121001097 and 111121001106.

It is not an unprimeable number, because it can be changed into a prime (111121001021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241371 + ... + 1327871.

It is an arithmetic number, because the mean of its divisors is an integer number (9972815580).

Almost surely, 2^111121001121 is an apocalyptic number.

It is an amenable number.

111121001121 is a deficient number, since it is larger than the sum of its proper divisors (48444048159).

111121001121 is a wasteful number, since it uses less digits than its factorization.

111121001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119456.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111121001121 its reverse (121100121111), we get a palindrome (232221122232).

The spelling of 111121001121 in words is "one hundred eleven billion, one hundred twenty-one million, one thousand, one hundred twenty-one".