2121200032331 has 4 divisors (see below), whose sum is σ = 2121334633464. Its totient is φ = 2121065431200.

The previous prime is 2121200032327. The next prime is 2121200032397. The reversal of 2121200032331 is 1332300021212.

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 2121200032331 - 2² = 2121200032327 is a prime.

It is a super-2 number, since 2×2121200032331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121200052331) 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, 67276925 + ... + 67308446.

It is an arithmetic number, because the mean of its divisors is an integer number (530333658366).

Almost surely, 2^{2121200032331} is an apocalyptic number.

2121200032331 is a deficient number, since it is larger than the sum of its proper divisors (134601133).

2121200032331 is a wasteful number, since it uses less digits than its factorization.

2121200032331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134601132.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2121200032331 its reverse (1332300021212), we get a palindrome (3453500053543).

The spelling of 2121200032331 in words is "two trillion, one hundred twenty-one billion, two hundred million, thirty-two thousand, three hundred thirty-one".