1002021110221 has 4 divisors (see below), whose sum is σ = 1045587245472. Its totient is φ = 958454974972.

The previous prime is 1002021110219. The next prime is 1002021110339. The reversal of 1002021110221 is 1220111202001.

1002021110221 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 a cyclic number.

It is not a de Polignac number, because 1002021110221 - 2¹ = 1002021110219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002021110621) 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, 21783067591 + ... + 21783067636.

It is an arithmetic number, because the mean of its divisors is an integer number (261396811368).

Almost surely, 2^{1002021110221} is an apocalyptic number.

It is an amenable number.

1002021110221 is a deficient number, since it is larger than the sum of its proper divisors (43566135251).

1002021110221 is an equidigital number, since it uses as much as digits as its factorization.

1002021110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43566135250.

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

Adding to 1002021110221 its reverse (1220111202001), we get a palindrome (2222132312222).

The spelling of 1002021110221 in words is "one trillion, two billion, twenty-one million, one hundred ten thousand, two hundred twenty-one".