1111200120021 has 16 divisors (see below), whose sum is σ = 1486103528000. Its totient is φ = 738548713728.

The previous prime is 1111200119989. The next prime is 1111200120061. The reversal of 1111200120021 is 1200210021111.

It is not a de Polignac number, because 1111200120021 - 2⁵ = 1111200119989 is a prime.

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 = 1111200119979 and 1111200120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111200120061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18156330 + ... + 18217428.

It is an arithmetic number, because the mean of its divisors is an integer number (92881470500).

Almost surely, 2^{1111200120021} is an apocalyptic number.

It is an amenable number.

1111200120021 is a deficient number, since it is larger than the sum of its proper divisors (374903407979).

1111200120021 is a wasteful number, since it uses less digits than its factorization.

1111200120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79428.

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

Adding to 1111200120021 its reverse (1200210021111), we get a palindrome (2311410141132).

The spelling of 1111200120021 in words is "one trillion, one hundred eleven billion, two hundred million, one hundred twenty thousand, twenty-one".