2121200202311 has 4 divisors (see below), whose sum is σ = 2121233390952. Its totient is φ = 2121167013672.

The previous prime is 2121200202307. The next prime is 2121200202397. The reversal of 2121200202311 is 1132020021212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121200202311 - 2² = 2121200202307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121200202311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121200202811) 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, 16498265 + ... + 16626338.

It is an arithmetic number, because the mean of its divisors is an integer number (530308347738).

Almost surely, 2^{2121200202311} is an apocalyptic number.

2121200202311 is a deficient number, since it is larger than the sum of its proper divisors (33188641).

2121200202311 is an equidigital number, since it uses as much as digits as its factorization.

2121200202311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33188640.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2121200202311 its reverse (1132020021212), we get a palindrome (3253220223523).

The spelling of 2121200202311 in words is "two trillion, one hundred twenty-one billion, two hundred million, two hundred two thousand, three hundred eleven".