211354312565321 has 12 divisors (see below), whose sum is σ = 214389530579952. Its totient is φ = 208360745822136.

The previous prime is 211354312565303. The next prime is 211354312565377. The reversal of 211354312565321 is 123565213453112.

It is a de Polignac number, because none of the positive numbers 2^k-211354312565321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211354312565021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29630771 + ... + 36065096.

It is an arithmetic number, because the mean of its divisors is an integer number (17865794214996).

Almost surely, 2^{211354312565321} is an apocalyptic number.

It is an amenable number.

211354312565321 is a deficient number, since it is larger than the sum of its proper divisors (3035218014631).

211354312565321 is an frugal number, since it uses more digits than its factorization.

211354312565321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65696500 (or 65696417 counting only the distinct ones).

The product of its digits is 648000, while the sum is 44.

The spelling of 211354312565321 in words is "two hundred eleven trillion, three hundred fifty-four billion, three hundred twelve million, five hundred sixty-five thousand, three hundred twenty-one".