2123401244431 has 2 divisors, whose sum is σ = 2123401244432. Its totient is φ = 2123401244430.

The previous prime is 2123401244417. The next prime is 2123401244467. The reversal of 2123401244431 is 1344421043212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123401244431 - 2¹⁷ = 2123401113359 is a prime.

It is a super-2 number, since 2×2123401244431² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2123401244393 and 2123401244402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123401224431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061700622215 + 1061700622216.

It is an arithmetic number, because the mean of its divisors is an integer number (1061700622216).

Almost surely, 2^{2123401244431} is an apocalyptic number.

2123401244431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123401244431 is an equidigital number, since it uses as much as digits as its factorization.

2123401244431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 2123401244431 its reverse (1344421043212), we get a palindrome (3467822287643).

The spelling of 2123401244431 in words is "two trillion, one hundred twenty-three billion, four hundred one million, two hundred forty-four thousand, four hundred thirty-one".