2103213121005 has 32 divisors (see below), whose sum is σ = 3456475323264. Its totient is φ = 1091275635456.

The previous prime is 2103213120973. The next prime is 2103213121007. The reversal of 2103213121005 is 5001213123012.

It is not a de Polignac number, because 2103213121005 - 2⁵ = 2103213120973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103213121007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4892539 + ... + 5305031.

It is an arithmetic number, because the mean of its divisors is an integer number (108014853852).

Almost surely, 2^{2103213121005} is an apocalyptic number.

It is an amenable number.

2103213121005 is a deficient number, since it is larger than the sum of its proper divisors (1353262202259).

2103213121005 is a wasteful number, since it uses less digits than its factorization.

2103213121005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421725.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 2103213121005 its reverse (5001213123012), we get a palindrome (7104426244017).

The spelling of 2103213121005 in words is "two trillion, one hundred three billion, two hundred thirteen million, one hundred twenty-one thousand, five".