111132019978 has 32 divisors (see below), whose sum is σ = 193257163008. Its totient is φ = 46942156800.

The previous prime is 111132019969. The next prime is 111132019987. The reversal of 111132019978 is 879910231111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111132019969) and next prime (111132019987).

It is a super-2 number, since 2×111132019978² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3420088 + ... + 3452428.

It is an arithmetic number, because the mean of its divisors is an integer number (6039286344).

Almost surely, 2^111132019978 is an apocalyptic number.

111132019978 is a deficient number, since it is larger than the sum of its proper divisors (82125143030).

111132019978 is a wasteful number, since it uses less digits than its factorization.

111132019978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35878.

The product of its (nonzero) digits is 27216, while the sum is 43.

The spelling of 111132019978 in words is "one hundred eleven billion, one hundred thirty-two million, nineteen thousand, nine hundred seventy-eight".