211220223 has 8 divisors (see below), whose sum is σ = 298193328. Its totient is φ = 132530304.

The previous prime is 211220153. The next prime is 211220231. The reversal of 211220223 is 322022112.

It is a happy number.

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

It is not a de Polignac number, because 211220223 - 2¹² = 211216127 is a prime.

It is a super-2 number, since 2×211220223² = 89227965208339458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220123) 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, 2070736 + ... + 2070837.

It is an arithmetic number, because the mean of its divisors is an integer number (37274166).

Almost surely, 2^211220223 is an apocalyptic number.

211220223 is a deficient number, since it is larger than the sum of its proper divisors (86973105).

211220223 is a wasteful number, since it uses less digits than its factorization.

211220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141593.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 211220223 is about 14533.4174577076. The cubic root of 211220223 is about 595.5412282231.

Adding to 211220223 its reverse (322022112), we get a palindrome (533242335).

The spelling of 211220223 in words is "two hundred eleven million, two hundred twenty thousand, two hundred twenty-three".