111947999999 has 8 divisors (see below), whose sum is σ = 122186208000. Its totient is φ = 101719978200.

The previous prime is 111947999993. The next prime is 111948000029. The reversal of 111947999999 is 999999749111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111947999999 - 2³² = 107653032703 is a prime.

It is a super-2 number, since 2×111947999999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

111947999999 is a modest number, since divided by 999999 gives 111947 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111947999993) 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, 2523557 + ... + 2567534.

It is an arithmetic number, because the mean of its divisors is an integer number (15273276000).

Almost surely, 2^111947999999 is an apocalyptic number.

111947999999 is a deficient number, since it is larger than the sum of its proper divisors (10238208001).

111947999999 is a wasteful number, since it uses less digits than its factorization.

111947999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5093101.

The product of its digits is 133923132, while the sum is 77.

The spelling of 111947999999 in words is "one hundred eleven billion, nine hundred forty-seven million, nine hundred ninety-nine thousand, nine hundred ninety-nine".