2121201371 has 4 divisors (see below), whose sum is σ = 2137903872. Its totient is φ = 2104498872.

The previous prime is 2121201361. The next prime is 2121201389. The reversal of 2121201371 is 1731021212.

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 2121201371 - 2³⁰ = 1047459547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121201301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8351060 + ... + 8351313.

It is an arithmetic number, because the mean of its divisors is an integer number (534475968).

Almost surely, 2^2121201371 is an apocalyptic number.

2121201371 is a deficient number, since it is larger than the sum of its proper divisors (16702501).

2121201371 is a wasteful number, since it uses less digits than its factorization.

2121201371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16702500.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 2121201371 is about 46056.5019405512. The cubic root of 2121201371 is about 1284.8742721442.

Adding to 2121201371 its reverse (1731021212), we get a palindrome (3852222583).

The spelling of 2121201371 in words is "two billion, one hundred twenty-one million, two hundred one thousand, three hundred seventy-one".