213202101209 has 16 divisors (see below), whose sum is σ = 219089903760. Its totient is φ = 207347696640.

The previous prime is 213202101191. The next prime is 213202101221. The reversal of 213202101209 is 902101202312.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 18279851209 + 194922250000 = 135203^2 + 441500^2 .

It is a cyclic number.

It is not a de Polignac number, because 213202101209 - 2⁸ = 213202100953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213202101709) 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, 41991179 + ... + 41996255.

It is an arithmetic number, because the mean of its divisors is an integer number (13693118985).

Almost surely, 2^213202101209 is an apocalyptic number.

It is an amenable number.

213202101209 is a deficient number, since it is larger than the sum of its proper divisors (5887802551).

213202101209 is a wasteful number, since it uses less digits than its factorization.

213202101209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8140.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 213202101209 in words is "two hundred thirteen billion, two hundred two million, one hundred one thousand, two hundred nine".