211020310987 has 8 divisors (see below), whose sum is σ = 211280991296. Its totient is φ = 210759786432.

The previous prime is 211020310933. The next prime is 211020310993. The reversal of 211020310987 is 789013020112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211020310987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211020340987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2798593 + ... + 2873005.

It is an arithmetic number, because the mean of its divisors is an integer number (26410123912).

Almost surely, 2^211020310987 is an apocalyptic number.

211020310987 is a deficient number, since it is larger than the sum of its proper divisors (260680309).

211020310987 is a wasteful number, since it uses less digits than its factorization.

211020310987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77877.

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 211020310987 in words is "two hundred eleven billion, twenty million, three hundred ten thousand, nine hundred eighty-seven".