111229572889 has 4 divisors (see below), whose sum is σ = 111243496756. Its totient is φ = 111215649024.

The previous prime is 111229572871. The next prime is 111229572907. The reversal of 111229572889 is 988275922111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (111229572871) and next prime (111229572907).

It can be written as a sum of positive squares in 2 ways, for example, as 25683267600 + 85546305289 = 160260^2 + 292483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111229572889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111229572829) 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, 6949944 + ... + 6965929.

It is an arithmetic number, because the mean of its divisors is an integer number (27810874189).

Almost surely, 2^111229572889 is an apocalyptic number.

It is an amenable number.

111229572889 is a deficient number, since it is larger than the sum of its proper divisors (13923867).

111229572889 is an equidigital number, since it uses as much as digits as its factorization.

111229572889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13923866.

The product of its digits is 1451520, while the sum is 55.

The spelling of 111229572889 in words is "one hundred eleven billion, two hundred twenty-nine million, five hundred seventy-two thousand, eight hundred eighty-nine".