2123001011231 has 2 divisors, whose sum is σ = 2123001011232. Its totient is φ = 2123001011230.

The previous prime is 2123001011189. The next prime is 2123001011281. The reversal of 2123001011231 is 1321101003212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123001011231 - 2⁶ = 2123001011167 is a prime.

It is a super-2 number, since 2×2123001011231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123001011281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061500505615 + 1061500505616.

It is an arithmetic number, because the mean of its divisors is an integer number (1061500505616).

Almost surely, 2^{2123001011231} is an apocalyptic number.

2123001011231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123001011231 is an equidigital number, since it uses as much as digits as its factorization.

2123001011231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 2123001011231 its reverse (1321101003212), we get a palindrome (3444102014443).

The spelling of 2123001011231 in words is "two trillion, one hundred twenty-three billion, one million, eleven thousand, two hundred thirty-one".