212021120233 has 8 divisors (see below), whose sum is σ = 228336175368.
Its totient is φ = 195706884864.
The previous prime is 212021120093. The next prime is 212021120249. The reversal of 212021120233 is 332021120212.
Adding to 212021120233 its reverse (332021120212), we get a palindrome (544042240445).
It can be written as a sum of positive squares in 4 ways, for example, as 50860623529 + 161160496704 = 225523^2 + 401448^2
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 212021120233 - 237 = 74582166761 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 212021120233.
It is not an unprimeable number, because it can be changed into a prime (212021120263) 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, 397935 + ... + 763147.
It is an arithmetic number, because the mean of its divisors is an integer number (28542021921).
Almost surely, 2212021120233 is an apocalyptic number.
It is an amenable number.
212021120233 is a deficient number, since it is larger than the sum of its proper divisors (16315055135).
212021120233 is a wasteful number, since it uses less digits than its factorization.
212021120233 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 409883.
The product of its (nonzero) digits is 288, while the sum is 19.
The spelling of 212021120233 in words is "two hundred twelve billion, twenty-one million, one hundred twenty thousand, two hundred thirty-three".