211202202101987 has 2 divisors, whose sum is σ = 211202202101988. Its totient is φ = 211202202101986.

The previous prime is 211202202101983. The next prime is 211202202102071. The reversal of 211202202101987 is 789101202202112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211202202101987 - 2² = 211202202101983 is a prime.

It is a super-2 number, since 2×211202202101987² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211202202101987.

It is not a weakly prime, because it can be changed into another prime (211202202101981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105601101050993 + 105601101050994.

It is an arithmetic number, because the mean of its divisors is an integer number (105601101050994).

Almost surely, 2^{211202202101987} is an apocalyptic number.

211202202101987 is a deficient number, since it is larger than the sum of its proper divisors (1).

211202202101987 is an equidigital number, since it uses as much as digits as its factorization.

211202202101987 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 211202202101987 in words is "two hundred eleven trillion, two hundred two billion, two hundred two million, one hundred one thousand, nine hundred eighty-seven".