11112120021 has 8 divisors (see below), whose sum is σ = 14836104000. Its totient is φ = 7398108032.

The previous prime is 11112120007. The next prime is 11112120031. The reversal of 11112120021 is 12002121111.

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 11112120021 - 2⁹ = 11112119509 is a prime.

It is a super-2 number, since 2×11112120021² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11112119979 and 11112120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112120031) 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, 2490396 + ... + 2494853.

It is an arithmetic number, because the mean of its divisors is an integer number (1854513000).

Almost surely, 2^11112120021 is an apocalyptic number.

It is an amenable number.

11112120021 is a deficient number, since it is larger than the sum of its proper divisors (3723983979).

11112120021 is an equidigital number, since it uses as much as digits as its factorization.

11112120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985995.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11112120021 its reverse (12002121111), we get a palindrome (23114241132).

The spelling of 11112120021 in words is "eleven billion, one hundred twelve million, one hundred twenty thousand, twenty-one".