210961970201 has 4 divisors (see below), whose sum is σ = 212377822500. Its totient is φ = 209546117904.

The previous prime is 210961970137. The next prime is 210961970221. The reversal of 210961970201 is 102079169012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17942334601 + 193019635600 = 133949^2 + 439340^2 .

It is a cyclic number.

It is not a de Polignac number, because 210961970201 - 2⁶ = 210961970137 is a prime.

It is a super-2 number, since 2×210961970201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210961970221) 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, 707925926 + ... + 707926223.

It is an arithmetic number, because the mean of its divisors is an integer number (53094455625).

Almost surely, 2^210961970201 is an apocalyptic number.

It is an amenable number.

210961970201 is a deficient number, since it is larger than the sum of its proper divisors (1415852299).

210961970201 is a wasteful number, since it uses less digits than its factorization.

210961970201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415852298.

The product of its (nonzero) digits is 13608, while the sum is 38.

The spelling of 210961970201 in words is "two hundred ten billion, nine hundred sixty-one million, nine hundred seventy thousand, two hundred one".