201323011023220 has 24 divisors (see below), whose sum is σ = 422845676976744. Its totient is φ = 80516375108736.

The previous prime is 201323011023217. The next prime is 201323011023263. The reversal of 201323011023220 is 22320110323102.

It can be written as a sum of positive squares in 4 ways, for example, as 124531404884496 + 76791606138724 = 11159364^2 + 8763082^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201323011023191 and 201323011023200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801702607 + ... + 801953686.

It is an arithmetic number, because the mean of its divisors is an integer number (17618569874031).

Almost surely, 2^{201323011023220} is an apocalyptic number.

201323011023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201323011023220 is an abundant number, since it is smaller than the sum of its proper divisors (221522665953524).

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

201323011023220 is a wasteful number, since it uses less digits than its factorization.

201323011023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603662579 (or 1603662577 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 201323011023220 its reverse (22320110323102), we get a palindrome (223643121346322).

The spelling of 201323011023220 in words is "two hundred one trillion, three hundred twenty-three billion, eleven million, twenty-three thousand, two hundred twenty".