203123211000 has 64 divisors (see below), whose sum is σ = 633744427680. Its totient is φ = 54166188800.

The previous prime is 203123210987. The next prime is 203123211013. The reversal of 203123211000 is 112321302.

It is an interprime number because it is at equal distance from previous prime (203123210987) and next prime (203123211013).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 33850869 + ... + 33856868.

Almost surely, 2^203123211000 is an apocalyptic number.

203123211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203123211000 is an abundant number, since it is smaller than the sum of its proper divisors (430621216680).

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

203123211000 is a wasteful number, since it uses less digits than its factorization.

203123211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67707761 (or 67707747 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 203123211000 its reverse (112321302), we get a palindrome (203235532302).

The spelling of 203123211000 in words is "two hundred three billion, one hundred twenty-three million, two hundred eleven thousand".