212123221330 has 32 divisors (see below), whose sum is σ = 401943614400. Its totient is φ = 80378350272.

The previous prime is 212123221327. The next prime is 212123221381. The reversal of 212123221330 is 33122321212.

212123221330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212123221330² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4264141 + ... + 4313599.

It is an arithmetic number, because the mean of its divisors is an integer number (12560737950).

Almost surely, 2^212123221330 is an apocalyptic number.

212123221330 is a deficient number, since it is larger than the sum of its proper divisors (189820393070).

212123221330 is a wasteful number, since it uses less digits than its factorization.

212123221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72058.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 212123221330 its reverse (33122321212), we get a palindrome (245245542542).

The spelling of 212123221330 in words is "two hundred twelve billion, one hundred twenty-three million, two hundred twenty-one thousand, three hundred thirty".