21223301087 has 2 divisors, whose sum is σ = 21223301088. Its totient is φ = 21223301086.

The previous prime is 21223301081. The next prime is 21223301111. The reversal of 21223301087 is 78010332212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21223301087 - 2⁸ = 21223300831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223301081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611650543 + 10611650544.

It is an arithmetic number, because the mean of its divisors is an integer number (10611650544).

Almost surely, 2^21223301087 is an apocalyptic number.

21223301087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223301087 is an equidigital number, since it uses as much as digits as its factorization.

21223301087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 21223301087 its reverse (78010332212), we get a palindrome (99233633299).

The spelling of 21223301087 in words is "twenty-one billion, two hundred twenty-three million, three hundred one thousand, eighty-seven".