203122312420 has 24 divisors (see below), whose sum is σ = 426780615744. Its totient is φ = 81206304096.

The previous prime is 203122312417. The next prime is 203122312441. The reversal of 203122312420 is 24213221302.

It is a junction number, because it is equal to n+sod(n) for n = 203122312391 and 203122312400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2624712 + ... + 2700991.

It is an arithmetic number, because the mean of its divisors is an integer number (17782525656).

Almost surely, 2^203122312420 is an apocalyptic number.

203122312420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203122312420 is an abundant number, since it is smaller than the sum of its proper divisors (223658303324).

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

203122312420 is a wasteful number, since it uses less digits than its factorization.

203122312420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327619 (or 5327617 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 203122312420 its reverse (24213221302), we get a palindrome (227335533722).

The spelling of 203122312420 in words is "two hundred three billion, one hundred twenty-two million, three hundred twelve thousand, four hundred twenty".