210985101 has 32 divisors (see below), whose sum is σ = 339660800. Its totient is φ = 128945520.

The previous prime is 210985051. The next prime is 210985109. The reversal of 210985101 is 101589012.

It is not a de Polignac number, because 210985101 - 2¹⁵ = 210952333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210985109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9270 + ... + 22536.

It is an arithmetic number, because the mean of its divisors is an integer number (10614400).

Almost surely, 2^210985101 is an apocalyptic number.

It is an amenable number.

210985101 is a deficient number, since it is larger than the sum of its proper divisors (128675699).

210985101 is a wasteful number, since it uses less digits than its factorization.

210985101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13326 (or 13320 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 210985101 is about 14525.3261925507. The cubic root of 210985101 is about 595.3201685292.

The spelling of 210985101 in words is "two hundred ten million, nine hundred eighty-five thousand, one hundred one".