1002121112221 has 4 divisors (see below), whose sum is σ = 1034447599744. Its totient is φ = 969794624700.

The previous prime is 1002121112147. The next prime is 1002121112231. The reversal of 1002121112221 is 1222111212001.

1002121112221 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 a de Polignac number, because none of the positive numbers 2^k-1002121112221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002121112195 and 1002121112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002121112231) 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, 16163243715 + ... + 16163243776.

It is an arithmetic number, because the mean of its divisors is an integer number (258611899936).

Almost surely, 2^{1002121112221} is an apocalyptic number.

It is an amenable number.

1002121112221 is a deficient number, since it is larger than the sum of its proper divisors (32326487523).

1002121112221 is an equidigital number, since it uses as much as digits as its factorization.

1002121112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32326487522.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1002121112221 its reverse (1222111212001), we get a palindrome (2224232324222).

The spelling of 1002121112221 in words is "one trillion, two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".