211301023221 has 16 divisors (see below), whose sum is σ = 313178205120. Its totient is φ = 140804505360.

The previous prime is 211301023217. The next prime is 211301023229. The reversal of 211301023221 is 122320103112.

211301023221 is a `hidden beast` number, since 211 + 30 + 102 + 322 + 1 = 666.

It is not a de Polignac number, because 211301023221 - 2² = 211301023217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211301023194 and 211301023203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211301023229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1683970 + ... + 1805091.

It is an arithmetic number, because the mean of its divisors is an integer number (19573637820).

Almost surely, 2^211301023221 is an apocalyptic number.

It is an amenable number.

211301023221 is a deficient number, since it is larger than the sum of its proper divisors (101877181899).

211301023221 is a wasteful number, since it uses less digits than its factorization.

211301023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491313 (or 3491307 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 211301023221 its reverse (122320103112), we get a palindrome (333621126333).

The spelling of 211301023221 in words is "two hundred eleven billion, three hundred one million, twenty-three thousand, two hundred twenty-one".