1111102220021 has 4 divisors (see below), whose sum is σ = 1114249818732. Its totient is φ = 1107954621312.

The previous prime is 1111102219993. The next prime is 1111102220093. The reversal of 1111102220021 is 1200222011111.

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 727334359921 + 383767860100 = 852839^2 + 619490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111102220021 - 2⁶ = 1111102219957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111102219978 and 1111102220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111102220521) 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, 1573798826 + ... + 1573799531.

It is an arithmetic number, because the mean of its divisors is an integer number (278562454683).

Almost surely, 2^{1111102220021} is an apocalyptic number.

It is an amenable number.

1111102220021 is a deficient number, since it is larger than the sum of its proper divisors (3147598711).

1111102220021 is an equidigital number, since it uses as much as digits as its factorization.

1111102220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147598710.

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

Adding to 1111102220021 its reverse (1200222011111), we get a palindrome (2311324231132).

The spelling of 1111102220021 in words is "one trillion, one hundred eleven billion, one hundred two million, two hundred twenty thousand, twenty-one".