203211321240 has 64 divisors (see below), whose sum is σ = 623811513600. Its totient is φ = 52929459072.

The previous prime is 203211321221. The next prime is 203211321259. The reversal of 203211321240 is 42123112302.

It is an interprime number because it is at equal distance from previous prime (203211321221) and next prime (203211321259).

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, 19685860 + ... + 19696179.

It is an arithmetic number, because the mean of its divisors is an integer number (9747054900).

Almost surely, 2^203211321240 is an apocalyptic number.

203211321240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203211321240 is an abundant number, since it is smaller than the sum of its proper divisors (420600192360).

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

203211321240 is a wasteful number, since it uses less digits than its factorization.

203211321240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39382096 (or 39382092 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 203211321240 its reverse (42123112302), we get a palindrome (245334433542).

The spelling of 203211321240 in words is "two hundred three billion, two hundred eleven million, three hundred twenty-one thousand, two hundred forty".