2002101221121 has 4 divisors (see below), whose sum is σ = 2669468294832. Its totient is φ = 1334734147412.

The previous prime is 2002101221119. The next prime is 2002101221203. The reversal of 2002101221121 is 1211221012002.

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 2002101221121 - 2¹ = 2002101221119 is a prime.

It is a super-2 number, since 2×2002101221121² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2002101221121.

It is not an unprimeable number, because it can be changed into a prime (2002101223121) 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, 333683536851 + ... + 333683536856.

It is an arithmetic number, because the mean of its divisors is an integer number (667367073708).

Almost surely, 2^{2002101221121} is an apocalyptic number.

It is an amenable number.

2002101221121 is a deficient number, since it is larger than the sum of its proper divisors (667367073711).

2002101221121 is an equidigital number, since it uses as much as digits as its factorization.

2002101221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667367073710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2002101221121 its reverse (1211221012002), we get a palindrome (3213322233123).

It can be divided in two parts, 2002101 and 221121, that added together give a palindrome (2223222).

The spelling of 2002101221121 in words is "two trillion, two billion, one hundred one million, two hundred twenty-one thousand, one hundred twenty-one".