2123021321003 has 16 divisors (see below), whose sum is σ = 2330371524096. Its totient is φ = 1918063916640.

The previous prime is 2123021320949. The next prime is 2123021321009. The reversal of 2123021321003 is 3001231203212.

It is a cyclic number.

It is not a de Polignac number, because 2123021321003 - 2⁸ = 2123021320747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123021321009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48258125 + ... + 48302097.

It is an arithmetic number, because the mean of its divisors is an integer number (145648220256).

Almost surely, 2^{2123021321003} is an apocalyptic number.

2123021321003 is a deficient number, since it is larger than the sum of its proper divisors (207350203093).

2123021321003 is a wasteful number, since it uses less digits than its factorization.

2123021321003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71074.

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

Adding to 2123021321003 its reverse (3001231203212), we get a palindrome (5124252524215).

The spelling of 2123021321003 in words is "two trillion, one hundred twenty-three billion, twenty-one million, three hundred twenty-one thousand, three".