427219104421 has 2 divisors, whose sum is σ = 427219104422. Its totient is φ = 427219104420.

The previous prime is 427219104379. The next prime is 427219104439. The reversal of 427219104421 is 124401912724.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386279652196 + 40939452225 = 621514^2 + 202335^2 .

It is a cyclic number.

It is not a de Polignac number, because 427219104421 - 2³⁷ = 289780150949 is a prime.

It is a super-3 number, since 3×427219104421³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427219104451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213609552210 + 213609552211.

It is an arithmetic number, because the mean of its divisors is an integer number (213609552211).

Almost surely, 2^427219104421 is an apocalyptic number.

It is an amenable number.

427219104421 is a deficient number, since it is larger than the sum of its proper divisors (1).

427219104421 is an equidigital number, since it uses as much as digits as its factorization.

427219104421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 427219104421 in words is "four hundred twenty-seven billion, two hundred nineteen million, one hundred four thousand, four hundred twenty-one".