2121221020001 has 8 divisors (see below), whose sum is σ = 2234035147680. Its totient is φ = 2008523983968.

The previous prime is 2121221019979. The next prime is 2121221020013. The reversal of 2121221020001 is 1000201221212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121221020001 - 2¹⁰ = 2121221018977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121221020031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29235716 + ... + 29308181.

It is an arithmetic number, because the mean of its divisors is an integer number (279254393460).

Almost surely, 2^{2121221020001} is an apocalyptic number.

It is an amenable number.

2121221020001 is a deficient number, since it is larger than the sum of its proper divisors (112814127679).

2121221020001 is a wasteful number, since it uses less digits than its factorization.

2121221020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58545823.

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

Adding to 2121221020001 its reverse (1000201221212), we get a palindrome (3121422241213).

The spelling of 2121221020001 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, twenty thousand, one".