211221210000987 has 24 divisors (see below), whose sum is σ = 308660624410320. Its totient is φ = 139170917571840.

The previous prime is 211221210000953. The next prime is 211221210000989. The reversal of 211221210000987 is 789000012122112.

211221210000987 is a `hidden beast` number, since 211 + 221 + 210 + 0 + 0 + 0 + 9 + 8 + 7 = 666.

It is not a de Polignac number, because 211221210000987 - 2³⁹ = 210671454187099 is a prime.

It is a super-2 number, since 2×211221210000987² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221210000989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55975833 + ... + 59629994.

It is an arithmetic number, because the mean of its divisors is an integer number (12860859350430).

Almost surely, 2^{211221210000987} is an apocalyptic number.

211221210000987 is a deficient number, since it is larger than the sum of its proper divisors (97439414409333).

211221210000987 is a wasteful number, since it uses less digits than its factorization.

211221210000987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115608203 (or 115608200 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 211221210000987 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, nine hundred eighty-seven", and thus it is an aban number.