221420434019 has 2 divisors, whose sum is σ = 221420434020. Its totient is φ = 221420434018.

The previous prime is 221420433979. The next prime is 221420434043. The reversal of 221420434019 is 910434024122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221420434019 - 2²⁸ = 221151998563 is a prime.

It is a super-2 number, since 2×221420434019² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (221420434519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710217009 + 110710217010.

It is an arithmetic number, because the mean of its divisors is an integer number (110710217010).

Almost surely, 2^221420434019 is an apocalyptic number.

221420434019 is a deficient number, since it is larger than the sum of its proper divisors (1).

221420434019 is an equidigital number, since it uses as much as digits as its factorization.

221420434019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 221420434019 in words is "two hundred twenty-one billion, four hundred twenty million, four hundred thirty-four thousand, nineteen".