211621164371 has 4 divisors (see below), whose sum is σ = 213493918152. Its totient is φ = 209748410592.

The previous prime is 211621164343. The next prime is 211621164383. The reversal of 211621164371 is 173461126112.

211621164371 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.

It is a cyclic number.

It is not a de Polignac number, because 211621164371 - 2¹⁴ = 211621147987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211621164331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 936376721 + ... + 936376946.

It is an arithmetic number, because the mean of its divisors is an integer number (53373479538).

Almost surely, 2^211621164371 is an apocalyptic number.

211621164371 is a deficient number, since it is larger than the sum of its proper divisors (1872753781).

211621164371 is a wasteful number, since it uses less digits than its factorization.

211621164371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872753780.

The product of its digits is 12096, while the sum is 35.

The spelling of 211621164371 in words is "two hundred eleven billion, six hundred twenty-one million, one hundred sixty-four thousand, three hundred seventy-one".