221021322002087 has 2 divisors, whose sum is σ = 221021322002088. Its totient is φ = 221021322002086.

The previous prime is 221021322002077. The next prime is 221021322002119. The reversal of 221021322002087 is 780200223120122.

It is an a-pointer prime, because the next prime (221021322002119) can be obtained adding 221021322002087 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221021322002087 - 2²² = 221021317807783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221021322002077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510661001043 + 110510661001044.

It is an arithmetic number, because the mean of its divisors is an integer number (110510661001044).

Almost surely, 2^{221021322002087} is an apocalyptic number.

221021322002087 is a deficient number, since it is larger than the sum of its proper divisors (1).

221021322002087 is an equidigital number, since it uses as much as digits as its factorization.

221021322002087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 221021322002087 in words is "two hundred twenty-one trillion, twenty-one billion, three hundred twenty-two million, two thousand, eighty-seven".