1110021220021 has 4 divisors (see below), whose sum is σ = 1268595680032. Its totient is φ = 951446760012.

The previous prime is 1110021220003. The next prime is 1110021220073. The reversal of 1110021220021 is 1200221200111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1110021220021 - 2⁹ = 1110021219509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1110021219983 and 1110021220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110021220421) 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, 79287229995 + ... + 79287230008.

It is an arithmetic number, because the mean of its divisors is an integer number (317148920008).

Almost surely, 2^{1110021220021} is an apocalyptic number.

It is an amenable number.

1110021220021 is a deficient number, since it is larger than the sum of its proper divisors (158574460011).

1110021220021 is an equidigital number, since it uses as much as digits as its factorization.

1110021220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158574460010.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1110021220021 its reverse (1200221200111), we get a palindrome (2310242420132).

The spelling of 1110021220021 in words is "one trillion, one hundred ten billion, twenty-one million, two hundred twenty thousand, twenty-one".