212021200987 has 4 divisors (see below), whose sum is σ = 212190955000. Its totient is φ = 211851446976.

The previous prime is 212021200981. The next prime is 212021200991. The reversal of 212021200987 is 789002120212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021200987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021200981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84875133 + ... + 84877630.

It is an arithmetic number, because the mean of its divisors is an integer number (53047738750).

Almost surely, 2^212021200987 is an apocalyptic number.

212021200987 is a deficient number, since it is larger than the sum of its proper divisors (169754013).

212021200987 is a wasteful number, since it uses less digits than its factorization.

212021200987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169754012.

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

The spelling of 212021200987 in words is "two hundred twelve billion, twenty-one million, two hundred thousand, nine hundred eighty-seven".