224121819991 has 2 divisors, whose sum is σ = 224121819992. Its totient is φ = 224121819990.

The previous prime is 224121819983. The next prime is 224121820031. The reversal of 224121819991 is 199918121422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 224121819991 - 2³ = 224121819983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224121819931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112060909995 + 112060909996.

It is an arithmetic number, because the mean of its divisors is an integer number (112060909996).

Almost surely, 2^224121819991 is an apocalyptic number.

224121819991 is a deficient number, since it is larger than the sum of its proper divisors (1).

224121819991 is an equidigital number, since it uses as much as digits as its factorization.

224121819991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 49.

The spelling of 224121819991 in words is "two hundred twenty-four billion, one hundred twenty-one million, eight hundred nineteen thousand, nine hundred ninety-one".