211589880121 has 9 divisors (see below), whose sum is σ = 216209669349. Its totient is φ = 207066808284.

The previous prime is 211589880119. The next prime is 211589880193. The reversal of 211589880121 is 121088985112.

It is a happy number.

The square root of 211589880121 is 459989.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 211589880121 - 2¹ = 211589880119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211589880521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21614590 + ... + 21624376.

Almost surely, 2^211589880121 is an apocalyptic number.

211589880121 is the 459989-th square number.

211589880121 is the 229995-th centered octagonal number.

It is an amenable number.

211589880121 is a deficient number, since it is larger than the sum of its proper divisors (4619789228).

211589880121 is an frugal number, since it uses more digits than its factorization.

211589880121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19668 (or 9834 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 46.

The spelling of 211589880121 in words is "two hundred eleven billion, five hundred eighty-nine million, eight hundred eighty thousand, one hundred twenty-one".