2121202322201 has 4 divisors (see below), whose sum is σ = 2121205344804. Its totient is φ = 2121199299600.

The previous prime is 2121202322171. The next prime is 2121202322203. The reversal of 2121202322201 is 1022232021212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 888711571225 + 1232490750976 = 942715^2 + 1110176^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121202322201 - 2²² = 2121198127897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121202322203) 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, 150371 + ... + 2065191.

It is an arithmetic number, because the mean of its divisors is an integer number (530301336201).

Almost surely, 2^{2121202322201} is an apocalyptic number.

It is an amenable number.

2121202322201 is a deficient number, since it is larger than the sum of its proper divisors (3022603).

2121202322201 is a wasteful number, since it uses less digits than its factorization.

2121202322201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3022602.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2121202322201 its reverse (1022232021212), we get a palindrome (3143434343413).

The spelling of 2121202322201 in words is "two trillion, one hundred twenty-one billion, two hundred two million, three hundred twenty-two thousand, two hundred one".