212000000020987 has 2 divisors, whose sum is σ = 212000000020988. Its totient is φ = 212000000020986.

The previous prime is 212000000020973. The next prime is 212000000021021. The reversal of 212000000020987 is 789020000000212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212000000020987 is a prime.

It is not a weakly prime, because it can be changed into another prime (212000000020927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000000010493 + 106000000010494.

It is an arithmetic number, because the mean of its divisors is an integer number (106000000010494).

Almost surely, 2^{212000000020987} is an apocalyptic number.

212000000020987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212000000020987 is an equidigital number, since it uses as much as digits as its factorization.

212000000020987 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 31.

The spelling of 212000000020987 in words is "two hundred twelve trillion, twenty thousand, nine hundred eighty-seven".