212021013234 has 64 divisors (see below), whose sum is σ = 440544614400. Its totient is φ = 67975904640.

The previous prime is 212021013233. The next prime is 212021013263. The reversal of 212021013234 is 432310120212.

It is a self number, because there is not a number n which added to its sum of digits gives 212021013234.

It is not an unprimeable number, because it can be changed into a prime (212021013233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16241542 + ... + 16254590.

It is an arithmetic number, because the mean of its divisors is an integer number (6883509600).

Almost surely, 2^212021013234 is an apocalyptic number.

212021013234 is an abundant number, since it is smaller than the sum of its proper divisors (228523601166).

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

212021013234 is a wasteful number, since it uses less digits than its factorization.

212021013234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14055.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212021013234 its reverse (432310120212), we get a palindrome (644331133446).

The spelling of 212021013234 in words is "two hundred twelve billion, twenty-one million, thirteen thousand, two hundred thirty-four".