212133021020 has 24 divisors (see below), whose sum is σ = 446720248800. Its totient is φ = 84616845632.

The previous prime is 212133021007. The next prime is 212133021071. The reversal of 212133021020 is 20120331212.

It is a self number, because there is not a number n which added to its sum of digits gives 212133021020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14765315 + ... + 14779674.

It is an arithmetic number, because the mean of its divisors is an integer number (18613343700).

Almost surely, 2^212133021020 is an apocalyptic number.

212133021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212133021020 is an abundant number, since it is smaller than the sum of its proper divisors (234587227780).

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

212133021020 is a wasteful number, since it uses less digits than its factorization.

212133021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29545357 (or 29545355 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212133021020 its reverse (20120331212), we get a palindrome (232253352232).

The spelling of 212133021020 in words is "two hundred twelve billion, one hundred thirty-three million, twenty-one thousand, twenty".