211220221113 has 72 divisors (see below), whose sum is σ = 353822264640. Its totient is φ = 120393423360.

The previous prime is 211220221111. The next prime is 211220221133. The reversal of 211220221113 is 311122022112.

211220221113 is a `hidden beast` number, since 211 + 220 + 221 + 1 + 13 = 666.

It is not a de Polignac number, because 211220221113 - 2¹ = 211220221111 is a prime.

It is a super-2 number, since 2×211220221113² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220221111) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 75731923 + ... + 75734711.

It is an arithmetic number, because the mean of its divisors is an integer number (4914198120).

Almost surely, 2^211220221113 is an apocalyptic number.

It is an amenable number.

211220221113 is a deficient number, since it is larger than the sum of its proper divisors (142602043527).

211220221113 is a wasteful number, since it uses less digits than its factorization.

211220221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487 (or 5467 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 211220221113 its reverse (311122022112), we get a palindrome (522342243225).

The spelling of 211220221113 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, one hundred thirteen".