221245203499 has 2 divisors, whose sum is σ = 221245203500. Its totient is φ = 221245203498.

The previous prime is 221245203497. The next prime is 221245203551. The reversal of 221245203499 is 994302542122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221245203499 - 2¹ = 221245203497 is a prime.

Together with 221245203497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221245203497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110622601749 + 110622601750.

It is an arithmetic number, because the mean of its divisors is an integer number (110622601750).

Almost surely, 2^221245203499 is an apocalyptic number.

221245203499 is a deficient number, since it is larger than the sum of its proper divisors (1).

221245203499 is an equidigital number, since it uses as much as digits as its factorization.

221245203499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 221245203499 in words is "two hundred twenty-one billion, two hundred forty-five million, two hundred three thousand, four hundred ninety-nine".