212133221650 has 96 divisors (see below), whose sum is σ = 485719769088. Its totient is φ = 67324910400.

The previous prime is 212133221621. The next prime is 212133221659. The reversal of 212133221650 is 56122331212.

It is not an unprimeable number, because it can be changed into a prime (212133221659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 175482 + ... + 674581.

It is an arithmetic number, because the mean of its divisors is an integer number (5059580928).

Almost surely, 2^212133221650 is an apocalyptic number.

212133221650 is an abundant number, since it is smaller than the sum of its proper divisors (273586547438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212133221650 is a wasteful number, since it uses less digits than its factorization.

212133221650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850136 (or 850131 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 212133221650 its reverse (56122331212), we get a palindrome (268255552862).

The spelling of 212133221650 in words is "two hundred twelve billion, one hundred thirty-three million, two hundred twenty-one thousand, six hundred fifty".