212011133221 has 8 divisors (see below), whose sum is σ = 213110352000. Its totient is φ = 210912253200.

The previous prime is 212011133177. The next prime is 212011133239. The reversal of 212011133221 is 122331110212.

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 212011133221 - 2⁷ = 212011133093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011133821) 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, 1222335 + ... + 1384963.

It is an arithmetic number, because the mean of its divisors is an integer number (26638794000).

Almost surely, 2^212011133221 is an apocalyptic number.

It is an amenable number.

212011133221 is a deficient number, since it is larger than the sum of its proper divisors (1099218779).

212011133221 is a wasteful number, since it uses less digits than its factorization.

212011133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169379.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212011133221 its reverse (122331110212), we get a palindrome (334342243433).

The spelling of 212011133221 in words is "two hundred twelve billion, eleven million, one hundred thirty-three thousand, two hundred twenty-one".