201313121212 has 48 divisors (see below), whose sum is σ = 416361351168. Its totient is φ = 83343821760.

The previous prime is 201313121201. The next prime is 201313121257. The reversal of 201313121212 is 212121313102.

It is a self number, because there is not a number n which added to its sum of digits gives 201313121212.

It is a congruent number.

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, 275283 + ... + 691669.

It is an arithmetic number, because the mean of its divisors is an integer number (8674194816).

Almost surely, 2^201313121212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201313121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208180675584).

201313121212 is an abundant number, since it is smaller than the sum of its proper divisors (215048229956).

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

201313121212 is a wasteful number, since it uses less digits than its factorization.

201313121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416986 (or 416984 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 201313121212 its reverse (212121313102), we get a palindrome (413434434314).

The spelling of 201313121212 in words is "two hundred one billion, three hundred thirteen million, one hundred twenty-one thousand, two hundred twelve".