201224220340 has 144 divisors (see below), whose sum is σ = 501140727360. Its totient is φ = 67277783040.

The previous prime is 201224220299. The next prime is 201224220347. The reversal of 201224220340 is 43022422102.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201224220347) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9544731 + ... + 9565789.

It is an arithmetic number, because the mean of its divisors is an integer number (3480143940).

Almost surely, 2^201224220340 is an apocalyptic number.

201224220340 is a gapful number since it is divisible by the number (20) 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 201224220340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250570363680).

201224220340 is an abundant number, since it is smaller than the sum of its proper divisors (299916507020).

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

201224220340 is a wasteful number, since it uses less digits than its factorization.

201224220340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21362 (or 21347 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 201224220340 its reverse (43022422102), we get a palindrome (244246642442).

The spelling of 201224220340 in words is "two hundred one billion, two hundred twenty-four million, two hundred twenty thousand, three hundred forty".