212021209087 has 2 divisors, whose sum is σ = 212021209088. Its totient is φ = 212021209086.

The previous prime is 212021209079. The next prime is 212021209091. The reversal of 212021209087 is 780902120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212021209087 - 2³ = 212021209079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021209007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010604543 + 106010604544.

It is an arithmetic number, because the mean of its divisors is an integer number (106010604544).

Almost surely, 2^212021209087 is an apocalyptic number.

212021209087 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021209087 is an equidigital number, since it uses as much as digits as its factorization.

212021209087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

Adding to 212021209087 its reverse (780902120212), we get a palindrome (992923329299).

The spelling of 212021209087 in words is "two hundred twelve billion, twenty-one million, two hundred nine thousand, eighty-seven".