111121778293 has 16 divisors (see below), whose sum is σ = 118614386880. Its totient is φ = 103794597504.

The previous prime is 111121778267. The next prime is 111121778347. The reversal of 111121778293 is 392877121111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111121778293 is a prime.

It is a super-2 number, since 2×111121778293² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121778233) 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, 4430055 + ... + 4455067.

It is an arithmetic number, because the mean of its divisors is an integer number (7413399180).

Almost surely, 2^111121778293 is an apocalyptic number.

It is an amenable number.

111121778293 is a deficient number, since it is larger than the sum of its proper divisors (7492608587).

111121778293 is a wasteful number, since it uses less digits than its factorization.

111121778293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28308.

The product of its digits is 42336, while the sum is 43.

The spelling of 111121778293 in words is "one hundred eleven billion, one hundred twenty-one million, seven hundred seventy-eight thousand, two hundred ninety-three".