203121344320340 has 48 divisors (see below), whose sum is σ = 435638890455552. Its totient is φ = 79518306107136.

The previous prime is 203121344320333. The next prime is 203121344320403. The reversal of 203121344320340 is 43023443121302.

It is a junction number, because it is equal to n+sod(n) for n = 203121344320297 and 203121344320306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47108897 + ... + 51239543.

It is an arithmetic number, because the mean of its divisors is an integer number (9075810217824).

Almost surely, 2^{203121344320340} is an apocalyptic number.

203121344320340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203121344320340 is an abundant number, since it is smaller than the sum of its proper divisors (232517546135212).

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

203121344320340 is a wasteful number, since it uses less digits than its factorization.

203121344320340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183016 (or 4183014 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 203121344320340 its reverse (43023443121302), we get a palindrome (246144787441642).

The spelling of 203121344320340 in words is "two hundred three trillion, one hundred twenty-one billion, three hundred forty-four million, three hundred twenty thousand, three hundred forty".