10002001220121 has 4 divisors (see below), whose sum is σ = 13336001626832. Its totient is φ = 6668000813412.

The previous prime is 10002001220053. The next prime is 10002001220147. The reversal of 10002001220121 is 12102210020001.

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 not a de Polignac number, because 10002001220121 - 2⁷ = 10002001219993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10002001220097 and 10002001220106.

It is not an unprimeable number, because it can be changed into a prime (10002001220161) 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, 1667000203351 + ... + 1667000203356.

It is an arithmetic number, because the mean of its divisors is an integer number (3334000406708).

Almost surely, 2^{10002001220121} is an apocalyptic number.

It is an amenable number.

10002001220121 is a deficient number, since it is larger than the sum of its proper divisors (3334000406711).

10002001220121 is an equidigital number, since it uses as much as digits as its factorization.

10002001220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334000406710.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10002001220121 its reverse (12102210020001), we get a palindrome (22104211240122).

The spelling of 10002001220121 in words is "ten trillion, two billion, one million, two hundred twenty thousand, one hundred twenty-one".