213121303212 has 24 divisors (see below), whose sum is σ = 498271689216. Its totient is φ = 70899198928.

The previous prime is 213121303207. The next prime is 213121303273. The reversal of 213121303212 is 212303121312.

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, 17648148 + ... + 17660219.

It is an arithmetic number, because the mean of its divisors is an integer number (20761320384).

Almost surely, 2^213121303212 is an apocalyptic number.

It is an amenable number.

213121303212 is an abundant number, since it is smaller than the sum of its proper divisors (285150386004).

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

213121303212 is a wasteful number, since it uses less digits than its factorization.

213121303212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35308877 (or 35308875 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213121303212 its reverse (212303121312), we get a palindrome (425424424524).

The spelling of 213121303212 in words is "two hundred thirteen billion, one hundred twenty-one million, three hundred three thousand, two hundred twelve".