427234374221 has 2 divisors, whose sum is σ = 427234374222. Its totient is φ = 427234374220.

The previous prime is 427234374103. The next prime is 427234374227. The reversal of 427234374221 is 122473432724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426749934121 + 484440100 = 653261^2 + 22010^2 .

It is a cyclic number.

It is not a de Polignac number, because 427234374221 - 2¹⁰ = 427234373197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427234374227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213617187110 + 213617187111.

It is an arithmetic number, because the mean of its divisors is an integer number (213617187111).

Almost surely, 2^427234374221 is an apocalyptic number.

It is an amenable number.

427234374221 is a deficient number, since it is larger than the sum of its proper divisors (1).

427234374221 is an equidigital number, since it uses as much as digits as its factorization.

427234374221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 41.

The spelling of 427234374221 in words is "four hundred twenty-seven billion, two hundred thirty-four million, three hundred seventy-four thousand, two hundred twenty-one".