1112120021 has 8 divisors (see below), whose sum is σ = 1119171744. Its totient is φ = 1105085520.

The previous prime is 1112119993. The next prime is 1112120029. The reversal of 1112120021 is 1200212111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112120021 is a prime.

It is a super-2 number, since 2×1112120021² = 2473621882218080882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1112119984 and 1112120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112120029) 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, 140255 + ... + 147971.

It is an arithmetic number, because the mean of its divisors is an integer number (139896468).

Almost surely, 2^1112120021 is an apocalyptic number.

It is an amenable number.

1112120021 is a deficient number, since it is larger than the sum of its proper divisors (7051723).

1112120021 is an equidigital number, since it uses as much as digits as its factorization.

1112120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8611.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1112120021 is about 33348.4635478158. The cubic root of 1112120021 is about 1036.0575655739.

Adding to 1112120021 its reverse (1200212111), we get a palindrome (2312332132).

The spelling of 1112120021 in words is "one billion, one hundred twelve million, one hundred twenty thousand, twenty-one".