201211912 has 64 divisors (see below), whose sum is σ = 434678400. Its totient is φ = 86423040.

The previous prime is 201211909. The next prime is 201211943. The reversal of 201211912 is 219112102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201211912.

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, 179578 + ... + 180694.

It is an arithmetic number, because the mean of its divisors is an integer number (6791850).

Almost surely, 2^201211912 is an apocalyptic number.

201211912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201211912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217339200).

201211912 is an abundant number, since it is smaller than the sum of its proper divisors (233466488).

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

201211912 is a wasteful number, since it uses less digits than its factorization.

201211912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 201211912 is about 14184.9184699807. The cubic root of 201211912 is about 585.9823871513.

It can be divided in two parts, 2012 and 11912, that added together give a square (13924 = 118²).

The spelling of 201211912 in words is "two hundred one million, two hundred eleven thousand, nine hundred twelve".