1021100202021 has 4 divisors (see below), whose sum is σ = 1361466936032. Its totient is φ = 680733468012.

The previous prime is 1021100202007. The next prime is 1021100202029. The reversal of 1021100202021 is 1202020011201.

1021100202021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1021100202021 - 2¹⁰ = 1021100200997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021100201988 and 1021100202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100202029) 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, 170183367001 + ... + 170183367006.

It is an arithmetic number, because the mean of its divisors is an integer number (340366734008).

Almost surely, 2^{1021100202021} is an apocalyptic number.

It is an amenable number.

1021100202021 is a deficient number, since it is larger than the sum of its proper divisors (340366734011).

1021100202021 is an equidigital number, since it uses as much as digits as its factorization.

1021100202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340366734010.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1021100202021 its reverse (1202020011201), we get a palindrome (2223120213222).

The spelling of 1021100202021 in words is "one trillion, twenty-one billion, one hundred million, two hundred two thousand, twenty-one".