201211240 has 32 divisors (see below), whose sum is σ = 460404000. Its totient is φ = 79119424.

The previous prime is 201211229. The next prime is 201211247. The reversal of 201211240 is 42112102.

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 201211240.

It is not an unprimeable number, because it can be changed into a prime (201211247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40270 + ... + 44989.

It is an arithmetic number, because the mean of its divisors is an integer number (14387625).

Almost surely, 2^201211240 is an apocalyptic number.

201211240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201211240 is an abundant number, since it is smaller than the sum of its proper divisors (259192760).

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

201211240 is a wasteful number, since it uses less digits than its factorization.

201211240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85329 (or 85325 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 201211240 is about 14184.8947828315. The cubic root of 201211240 is about 585.9817348033.

Adding to 201211240 its reverse (42112102), we get a palindrome (243323342).

The spelling of 201211240 in words is "two hundred one million, two hundred eleven thousand, two hundred forty".