211345251134221 has 4 divisors (see below), whose sum is σ = 211355344533600. Its totient is φ = 211335157734844.

The previous prime is 211345251134191. The next prime is 211345251134309. The reversal of 211345251134221 is 122431152543112.

211345251134221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211345251134221 - 2¹¹ = 211345251132173 is a prime.

It is a super-4 number, since 4×211345251134221⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211345251164221) 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, 5046668281 + ... + 5046710158.

It is an arithmetic number, because the mean of its divisors is an integer number (52838836133400).

Almost surely, 2^{211345251134221} is an apocalyptic number.

It is an amenable number.

211345251134221 is a deficient number, since it is larger than the sum of its proper divisors (10093399379).

211345251134221 is a wasteful number, since it uses less digits than its factorization.

211345251134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10093399378.

The product of its digits is 57600, while the sum is 37.

The spelling of 211345251134221 in words is "two hundred eleven trillion, three hundred forty-five billion, two hundred fifty-one million, one hundred thirty-four thousand, two hundred twenty-one".