1111202002021 has 4 divisors (see below), whose sum is σ = 1111277975500. Its totient is φ = 1111126028544.

The previous prime is 1111202002013. The next prime is 1111202002069. The reversal of 1111202002021 is 1202002021111.

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 304952450625 + 806249551396 = 552225^2 + 897914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111202002021 - 2³ = 1111202002013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111202001992 and 1111202002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111202002921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37964796 + ... + 37994053.

It is an arithmetic number, because the mean of its divisors is an integer number (277819493875).

Almost surely, 2^{1111202002021} is an apocalyptic number.

It is an amenable number.

1111202002021 is a deficient number, since it is larger than the sum of its proper divisors (75973479).

1111202002021 is an equidigital number, since it uses as much as digits as its factorization.

1111202002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75973478.

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

Adding to 1111202002021 its reverse (1202002021111), we get a palindrome (2313204023132).

It can be divided in two parts, 111 and 1202002021, that multiplied together give a palindrome (133422224331).

The spelling of 1111202002021 in words is "one trillion, one hundred eleven billion, two hundred two million, two thousand, twenty-one".