203210100100 has 108 divisors (see below), whose sum is σ = 543134713716. Its totient is φ = 65573652480.

The previous prime is 203210100059. The next prime is 203210100101. The reversal of 203210100100 is 1001012302.

It can be written as a sum of positive squares in 6 ways, for example, as 1803021444 + 201407078656 = 42462^2 + 448784^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (203210100101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1136449 + ... + 1303048.

It is an arithmetic number, because the mean of its divisors is an integer number (5029025127).

Almost surely, 2^203210100100 is an apocalyptic number.

203210100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203210100100 is an abundant number, since it is smaller than the sum of its proper divisors (339924613616).

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

203210100100 is a wasteful number, since it uses less digits than its factorization.

203210100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439542 (or 2439528 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 203210100100 its reverse (1001012302), we get a palindrome (204211112402).

The spelling of 203210100100 in words is "two hundred three billion, two hundred ten million, one hundred thousand, one hundred".