421029681427 has 2 divisors, whose sum is σ = 421029681428. Its totient is φ = 421029681426.

The previous prime is 421029681311. The next prime is 421029681431. The reversal of 421029681427 is 724186920124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421029681427 is a prime.

It is a super-2 number, since 2×421029681427² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421029682427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210514840713 + 210514840714.

It is an arithmetic number, because the mean of its divisors is an integer number (210514840714).

Almost surely, 2^421029681427 is an apocalyptic number.

421029681427 is a deficient number, since it is larger than the sum of its proper divisors (1).

421029681427 is an equidigital number, since it uses as much as digits as its factorization.

421029681427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 421029681427 in words is "four hundred twenty-one billion, twenty-nine million, six hundred eighty-one thousand, four hundred twenty-seven".