2002010020121 has 4 divisors (see below), whose sum is σ = 2066590988544. Its totient is φ = 1937429051700.

The previous prime is 2002010020001. The next prime is 2002010020141. The reversal of 2002010020121 is 1210200102002.

It is a happy number.

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-2002010020121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002010020141) 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, 32290484165 + ... + 32290484226.

It is an arithmetic number, because the mean of its divisors is an integer number (516647747136).

Almost surely, 2^{2002010020121} is an apocalyptic number.

It is an amenable number.

2002010020121 is a deficient number, since it is larger than the sum of its proper divisors (64580968423).

2002010020121 is an equidigital number, since it uses as much as digits as its factorization.

2002010020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64580968422.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2002010020121 its reverse (1210200102002), we get a palindrome (3212210122123).

The spelling of 2002010020121 in words is "two trillion, two billion, ten million, twenty thousand, one hundred twenty-one".