2123101031321 has 16 divisors (see below), whose sum is σ = 2169703200000. Its totient is φ = 2077051406976.

The previous prime is 2123101031273. The next prime is 2123101031323. The reversal of 2123101031321 is 1231301013212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123101031321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123101031293 and 2123101031302.

It is not an unprimeable number, because it can be changed into a prime (2123101031323) 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, 5399405 + ... + 5779253.

It is an arithmetic number, because the mean of its divisors is an integer number (135606450000).

Almost surely, 2^{2123101031321} is an apocalyptic number.

It is an amenable number.

2123101031321 is a deficient number, since it is larger than the sum of its proper divisors (46602168679).

2123101031321 is a wasteful number, since it uses less digits than its factorization.

2123101031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380576.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2123101031321 its reverse (1231301013212), we get a palindrome (3354402044533).

The spelling of 2123101031321 in words is "two trillion, one hundred twenty-three billion, one hundred one million, thirty-one thousand, three hundred twenty-one".