221421242683 has 2 divisors, whose sum is σ = 221421242684. Its totient is φ = 221421242682.

The previous prime is 221421242557. The next prime is 221421242687. The reversal of 221421242683 is 386242124122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221421242683 - 2³³ = 212831308091 is a prime.

It is a super-2 number, since 2×221421242683² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221421242687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710621341 + 110710621342.

It is an arithmetic number, because the mean of its divisors is an integer number (110710621342).

Almost surely, 2^221421242683 is an apocalyptic number.

221421242683 is a deficient number, since it is larger than the sum of its proper divisors (1).

221421242683 is an equidigital number, since it uses as much as digits as its factorization.

221421242683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 37.

The spelling of 221421242683 in words is "two hundred twenty-one billion, four hundred twenty-one million, two hundred forty-two thousand, six hundred eighty-three".