2121311323301 has 4 divisors (see below), whose sum is σ = 2123405412492. Its totient is φ = 2119217234112.

The previous prime is 2121311323283. The next prime is 2121311323319. The reversal of 2121311323301 is 1033231131212.

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

It is an interprime number because it is at equal distance from previous prime (2121311323283) and next prime (2121311323319).

It can be written as a sum of positive squares in 2 ways, for example, as 141732672676 + 1979578650625 = 376474^2 + 1406975^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121311323301 - 2³⁰ = 2120237581477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121311323361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047043076 + ... + 1047045101.

It is an arithmetic number, because the mean of its divisors is an integer number (530851353123).

Almost surely, 2^{2121311323301} is an apocalyptic number.

It is an amenable number.

2121311323301 is a deficient number, since it is larger than the sum of its proper divisors (2094089191).

2121311323301 is a wasteful number, since it uses less digits than its factorization.

2121311323301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094089190.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2121311323301 its reverse (1033231131212), we get a palindrome (3154542454513).

The spelling of 2121311323301 in words is "two trillion, one hundred twenty-one billion, three hundred eleven million, three hundred twenty-three thousand, three hundred one".