2121021222001 has 8 divisors (see below), whose sum is σ = 2335466019744. Its totient is φ = 1910180538720.

The previous prime is 2121021221999. The next prime is 2121021222031. The reversal of 2121021222001 is 1002221201212.

It is a happy number.

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 2121021222001 - 2¹ = 2121021221999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121021222031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901027380 + ... + 901029733.

It is an arithmetic number, because the mean of its divisors is an integer number (291933252468).

Almost surely, 2^{2121021222001} is an apocalyptic number.

It is an amenable number.

2121021222001 is a deficient number, since it is larger than the sum of its proper divisors (214444797743).

2121021222001 is a wasteful number, since it uses less digits than its factorization.

2121021222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802057231.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121021222001 its reverse (1002221201212), we get a palindrome (3123242423213).

The spelling of 2121021222001 in words is "two trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, one".