212120221033 has 4 divisors (see below), whose sum is σ = 242423109760. Its totient is φ = 181817332308.

The previous prime is 212120221009. The next prime is 212120221067. The reversal of 212120221033 is 330122021212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212120221033 - 2²¹ = 212118123881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212120221033.

It is not an unprimeable number, because it can be changed into a prime (212120221333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15151444353 + ... + 15151444366.

It is an arithmetic number, because the mean of its divisors is an integer number (60605777440).

Almost surely, 2^212120221033 is an apocalyptic number.

It is an amenable number.

212120221033 is a deficient number, since it is larger than the sum of its proper divisors (30302888727).

212120221033 is an equidigital number, since it uses as much as digits as its factorization.

212120221033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30302888726.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212120221033 its reverse (330122021212), we get a palindrome (542242242245).

The spelling of 212120221033 in words is "two hundred twelve billion, one hundred twenty million, two hundred twenty-one thousand, thirty-three".