2121014342431 has 4 divisors (see below), whose sum is σ = 2121019586392. Its totient is φ = 2121009098472.

The previous prime is 2121014342417. The next prime is 2121014342437. The reversal of 2121014342431 is 1342434101212.

It is a happy number.

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 2121014342431 - 2⁵ = 2121014342399 is a prime.

It is a super-3 number, since 3×2121014342431³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 2121014342431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121014342437) 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, 1959480 + ... + 2842813.

It is an arithmetic number, because the mean of its divisors is an integer number (530254896598).

Almost surely, 2^{2121014342431} is an apocalyptic number.

2121014342431 is a deficient number, since it is larger than the sum of its proper divisors (5243961).

2121014342431 is an equidigital number, since it uses as much as digits as its factorization.

2121014342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243960.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 2121014342431 its reverse (1342434101212), we get a palindrome (3463448443643).

The spelling of 2121014342431 in words is "two trillion, one hundred twenty-one billion, fourteen million, three hundred forty-two thousand, four hundred thirty-one".