201021340 has 24 divisors (see below), whose sum is σ = 454618080. Its totient is φ = 74223168.

The previous prime is 201021323. The next prime is 201021367. The reversal of 201021340 is 43120102.

201021340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 201021340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386320 + ... + 386839.

It is an arithmetic number, because the mean of its divisors is an integer number (18942420).

Almost surely, 2^201021340 is an apocalyptic number.

201021340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021340 is an abundant number, since it is smaller than the sum of its proper divisors (253596740).

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

201021340 is a wasteful number, since it uses less digits than its factorization.

201021340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773181 (or 773179 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 201021340 is about 14178.1994625552. The cubic root of 201021340 is about 585.7973300002.

Adding to 201021340 its reverse (43120102), we get a palindrome (244141442).

The spelling of 201021340 in words is "two hundred one million, twenty-one thousand, three hundred forty".