31201210212 has 48 divisors (see below), whose sum is σ = 76102656000. Its totient is φ = 9937493280.

The previous prime is 31201210141. The next prime is 31201210273. The reversal of 31201210212 is 21201210213.

It is a junction number, because it is equal to n+sod(n) for n = 31201210191 and 31201210200.

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, 501462 + ... + 560237.

It is an arithmetic number, because the mean of its divisors is an integer number (1585472000).

Almost surely, 2^31201210212 is an apocalyptic number.

It is an amenable number.

31201210212 is an abundant number, since it is smaller than the sum of its proper divisors (44901445788).

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

31201210212 is a wasteful number, since it uses less digits than its factorization.

31201210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061816 (or 1061814 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 31201210212 its reverse (21201210213), we get a palindrome (52402420425).

Subtracting from 31201210212 its reverse (21201210213), we obtain a palindrome (9999999999).

The spelling of 31201210212 in words is "thirty-one billion, two hundred one million, two hundred ten thousand, two hundred twelve".