2121000222001 has 4 divisors (see below), whose sum is σ = 2121120348400. Its totient is φ = 2120880095604.

The previous prime is 2121000221983. The next prime is 2121000222043. The reversal of 2121000222001 is 1002220001212.

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 not a de Polignac number, because 2121000222001 - 2²⁷ = 2120866004273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121000222071) 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, 60036711 + ... + 60072028.

It is an arithmetic number, because the mean of its divisors is an integer number (530280087100).

Almost surely, 2^{2121000222001} is an apocalyptic number.

It is an amenable number.

2121000222001 is a deficient number, since it is larger than the sum of its proper divisors (120126399).

2121000222001 is a wasteful number, since it uses less digits than its factorization.

2121000222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120126398.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2121000222001 its reverse (1002220001212), we get a palindrome (3123220223213).

The spelling of 2121000222001 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two thousand, one".