201356321280 has 320 divisors, whose sum is σ = 678766556160. Its totient is φ = 50780749824.

The previous prime is 201356321237. The next prime is 201356321281. The reversal of 201356321280 is 82123653102.

It is a tau number, because it is divible by the number of its divisors (320).

It is not an unprimeable number, because it can be changed into a prime (201356321281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141103927 + ... + 141105353.

It is an arithmetic number, because the mean of its divisors is an integer number (2121145488).

Almost surely, 2^201356321280 is an apocalyptic number.

201356321280 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 201356321280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339383278080).

201356321280 is an abundant number, since it is smaller than the sum of its proper divisors (477410234880).

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

201356321280 is a wasteful number, since it uses less digits than its factorization.

201356321280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439 (or 2423 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 201356321280 its reverse (82123653102), we get a palindrome (283479974382).

The spelling of 201356321280 in words is "two hundred one billion, three hundred fifty-six million, three hundred twenty-one thousand, two hundred eighty".