211332123205 has 16 divisors (see below), whose sum is σ = 306875554560. Its totient is φ = 136389134592.

The previous prime is 211332123179. The next prime is 211332123217. The reversal of 211332123205 is 502321233112.

It is a cyclic number.

It is not a de Polignac number, because 211332123205 - 2⁹ = 211332122693 is a prime.

It is a super-2 number, since 2×211332123205² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211332123205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177589425 + ... + 177590614.

It is an arithmetic number, because the mean of its divisors is an integer number (19179722160).

Almost surely, 2^211332123205 is an apocalyptic number.

It is an amenable number.

211332123205 is a deficient number, since it is larger than the sum of its proper divisors (95543431355).

211332123205 is a wasteful number, since it uses less digits than its factorization.

211332123205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355180068.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 211332123205 its reverse (502321233112), we get a palindrome (713653356317).

The spelling of 211332123205 in words is "two hundred eleven billion, three hundred thirty-two million, one hundred twenty-three thousand, two hundred five".