1021110002021 has 4 divisors (see below), whose sum is σ = 1021116681600. Its totient is φ = 1021103322444.

The previous prime is 1021110001993. The next prime is 1021110002039. The reversal of 1021110002021 is 1202000111201.

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 a cyclic number.

It is not a de Polignac number, because 1021110002021 - 2¹⁰ = 1021110000997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021110001993 and 1021110002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021110002321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3104981 + ... + 3418058.

It is an arithmetic number, because the mean of its divisors is an integer number (255279170400).

Almost surely, 2^{1021110002021} is an apocalyptic number.

It is an amenable number.

1021110002021 is a deficient number, since it is larger than the sum of its proper divisors (6679579).

1021110002021 is an equidigital number, since it uses as much as digits as its factorization.

1021110002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6679578.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021110002021 its reverse (1202000111201), we get a palindrome (2223110113222).

The spelling of 1021110002021 in words is "one trillion, twenty-one billion, one hundred ten million, two thousand, twenty-one".