210101997 has 16 divisors (see below), whose sum is σ = 338988672. Its totient is φ = 112995840.

The previous prime is 210101977. The next prime is 210102037. The reversal of 210101997 is 799101012.

It is not a de Polignac number, because 210101997 - 2⁶ = 210101933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293904 + ... + 294617.

It is an arithmetic number, because the mean of its divisors is an integer number (21186792).

Almost surely, 2^210101997 is an apocalyptic number.

It is an amenable number.

210101997 is a deficient number, since it is larger than the sum of its proper divisors (128886675).

210101997 is a wasteful number, since it uses less digits than its factorization.

210101997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588548.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 210101997 is about 14494.8955498134. The cubic root of 210101997 is about 594.4884117970.

The spelling of 210101997 in words is "two hundred ten million, one hundred one thousand, nine hundred ninety-seven".