2121021120001 has 4 divisors (see below), whose sum is σ = 2424024137152. Its totient is φ = 1818018102852.

The previous prime is 2121021119983. The next prime is 2121021120007. The reversal of 2121021120001 is 1000211201212.

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 2121021120001 - 2⁵ = 2121021119969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121021120007) 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, 151501508565 + ... + 151501508578.

It is an arithmetic number, because the mean of its divisors is an integer number (606006034288).

Almost surely, 2^{2121021120001} is an apocalyptic number.

It is an amenable number.

2121021120001 is a deficient number, since it is larger than the sum of its proper divisors (303003017151).

2121021120001 is an equidigital number, since it uses as much as digits as its factorization.

2121021120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303003017150.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2121021120001 its reverse (1000211201212), we get a palindrome (3121232321213).

The spelling of 2121021120001 in words is "two trillion, one hundred twenty-one billion, twenty-one million, one hundred twenty thousand, one".