211420220221 has 8 divisors (see below), whose sum is σ = 241638870464. Its totient is φ = 181205510400.

The previous prime is 211420220213. The next prime is 211420220237. The reversal of 211420220221 is 122022024112.

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 211420220221 - 2³ = 211420220213 is a prime.

It is a super-2 number, since 2×211420220221² (a number of 23 digits) contains 22 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 (211420220021) 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, 869220 + ... + 1085533.

It is an arithmetic number, because the mean of its divisors is an integer number (30204858808).

Almost surely, 2^211420220221 is an apocalyptic number.

It is an amenable number.

211420220221 is a deficient number, since it is larger than the sum of its proper divisors (30218650243).

211420220221 is a wasteful number, since it uses less digits than its factorization.

211420220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970211.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 211420220221 its reverse (122022024112), we get a palindrome (333442244333).

The spelling of 211420220221 in words is "two hundred eleven billion, four hundred twenty million, two hundred twenty thousand, two hundred twenty-one".