2002101220121 has 4 divisors (see below), whose sum is σ = 2031983327952. Its totient is φ = 1972219112292.

The previous prime is 2002101220099. The next prime is 2002101220127. The reversal of 2002101220121 is 1210221012002.

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 2002101220121 - 2¹⁴ = 2002101203737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002101220096 and 2002101220105.

It is not an unprimeable number, because it can be changed into a prime (2002101220127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14941053815 + ... + 14941053948.

It is an arithmetic number, because the mean of its divisors is an integer number (507995831988).

Almost surely, 2^{2002101220121} is an apocalyptic number.

It is an amenable number.

2002101220121 is a deficient number, since it is larger than the sum of its proper divisors (29882107831).

2002101220121 is an equidigital number, since it uses as much as digits as its factorization.

2002101220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29882107830.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2002101220121 its reverse (1210221012002), we get a palindrome (3212322232123).

It can be divided in two parts, 2002101 and 220121, that added together give a palindrome (2222222).

The spelling of 2002101220121 in words is "two trillion, two billion, one hundred one million, two hundred twenty thousand, one hundred twenty-one".