12900043427 has 2 divisors, whose sum is σ = 12900043428. Its totient is φ = 12900043426.

The previous prime is 12900043421. The next prime is 12900043447. The reversal of 12900043427 is 72434000921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12900043427 - 2¹⁰ = 12900042403 is a prime.

It is a super-2 number, since 2×12900043427² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12900043393 and 12900043402.

It is not a weakly prime, because it can be changed into another prime (12900043421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6450021713 + 6450021714.

It is an arithmetic number, because the mean of its divisors is an integer number (6450021714).

Almost surely, 2^12900043427 is an apocalyptic number.

12900043427 is a deficient number, since it is larger than the sum of its proper divisors (1).

12900043427 is an equidigital number, since it uses as much as digits as its factorization.

12900043427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 12900043427 in words is "twelve billion, nine hundred million, forty-three thousand, four hundred twenty-seven".