1110120212021 has 4 divisors (see below), whose sum is σ = 1115872130412. Its totient is φ = 1104368293632.

The previous prime is 1110120211987. The next prime is 1110120212023. The reversal of 1110120212021 is 1202120210111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 793455159121 + 316665052900 = 890761^2 + 562730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1110120212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1110120211987 and 1110120212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110120212023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2875958906 + ... + 2875959291.

It is an arithmetic number, because the mean of its divisors is an integer number (278968032603).

Almost surely, 2^{1110120212021} is an apocalyptic number.

It is an amenable number.

1110120212021 is a deficient number, since it is larger than the sum of its proper divisors (5751918391).

1110120212021 is an equidigital number, since it uses as much as digits as its factorization.

1110120212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751918390.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1110120212021 its reverse (1202120210111), we get a palindrome (2312240422132).

The spelling of 1110120212021 in words is "one trillion, one hundred ten billion, one hundred twenty million, two hundred twelve thousand, twenty-one".