111157020 has 144 divisors (see below), whose sum is σ = 369052320. Its totient is φ = 26915328.

The previous prime is 111157019. The next prime is 111157061. The reversal of 111157020 is 20751111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111156984 and 111157002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156426 + ... + 157134.

Almost surely, 2^111157020 is an apocalyptic number.

111157020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111157020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184526160).

111157020 is an abundant number, since it is smaller than the sum of its proper divisors (257895300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111157020 is a wasteful number, since it uses less digits than its factorization.

111157020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 111157020 is about 10543.1029588068. The cubic root of 111157020 is about 480.8160597273.

The spelling of 111157020 in words is "one hundred eleven million, one hundred fifty-seven thousand, twenty".