2123400504413 has 2 divisors, whose sum is σ = 2123400504414. Its totient is φ = 2123400504412.

The previous prime is 2123400504409. The next prime is 2123400504443. The reversal of 2123400504413 is 3144050043212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2058315310489 + 65085193924 = 1434683^2 + 255118^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123400504413 - 2² = 2123400504409 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123400504443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061700252206 + 1061700252207.

It is an arithmetic number, because the mean of its divisors is an integer number (1061700252207).

Almost surely, 2^{2123400504413} is an apocalyptic number.

It is an amenable number.

2123400504413 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123400504413 is an equidigital number, since it uses as much as digits as its factorization.

2123400504413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 2123400504413 its reverse (3144050043212), we get a palindrome (5267450547625).

The spelling of 2123400504413 in words is "two trillion, one hundred twenty-three billion, four hundred million, five hundred four thousand, four hundred thirteen".