2121321213007 has 4 divisors (see below), whose sum is σ = 2131981118800. Its totient is φ = 2110661307216.

The previous prime is 2121321212993. The next prime is 2121321213017. The reversal of 2121321213007 is 7003121231212.

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 2121321213007 - 2¹¹ = 2121321210959 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 (2121321213017) 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, 5329952598 + ... + 5329952995.

It is an arithmetic number, because the mean of its divisors is an integer number (532995279700).

Almost surely, 2^{2121321213007} is an apocalyptic number.

2121321213007 is a deficient number, since it is larger than the sum of its proper divisors (10659905793).

2121321213007 is a wasteful number, since it uses less digits than its factorization.

2121321213007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10659905792.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 2121321213007 its reverse (7003121231212), we get a palindrome (9124442444219).

The spelling of 2121321213007 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-one million, two hundred thirteen thousand, seven".