212020011221987 has 2 divisors, whose sum is σ = 212020011221988. Its totient is φ = 212020011221986.

The previous prime is 212020011221911. The next prime is 212020011222029. The reversal of 212020011221987 is 789122110020212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212020011221987 - 2¹² = 212020011217891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212020011221987.

It is not a weakly prime, because it can be changed into another prime (212020011221087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010005610993 + 106010005610994.

It is an arithmetic number, because the mean of its divisors is an integer number (106010005610994).

Almost surely, 2^{212020011221987} is an apocalyptic number.

212020011221987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212020011221987 is an equidigital number, since it uses as much as digits as its factorization.

212020011221987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 212020011221987 in words is "two hundred twelve trillion, twenty billion, eleven million, two hundred twenty-one thousand, nine hundred eighty-seven".