211343031221 has 8 divisors (see below), whose sum is σ = 255742827840. Its totient is φ = 170495218368.

The previous prime is 211343031209. The next prime is 211343031253. The reversal of 211343031221 is 122130343112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211343031221 - 2¹⁴ = 211343014837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211343037221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887995811 + ... + 887996048.

It is an arithmetic number, because the mean of its divisors is an integer number (31967853480).

Almost surely, 2^211343031221 is an apocalyptic number.

It is an amenable number.

211343031221 is a deficient number, since it is larger than the sum of its proper divisors (44399796619).

211343031221 is a wasteful number, since it uses less digits than its factorization.

211343031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775991883.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 211343031221 its reverse (122130343112), we get a palindrome (333473374333).

The spelling of 211343031221 in words is "two hundred eleven billion, three hundred forty-three million, thirty-one thousand, two hundred twenty-one".