221211232087 has 2 divisors, whose sum is σ = 221211232088. Its totient is φ = 221211232086.

The previous prime is 221211232027. The next prime is 221211232117. The reversal of 221211232087 is 780232112122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221211232087 - 2⁷ = 221211231959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221211232007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605616043 + 110605616044.

It is an arithmetic number, because the mean of its divisors is an integer number (110605616044).

Almost surely, 2^221211232087 is an apocalyptic number.

221211232087 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211232087 is an equidigital number, since it uses as much as digits as its factorization.

221211232087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 221211232087 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred thirty-two thousand, eighty-seven".