203210100105 has 32 divisors (see below), whose sum is σ = 336122075520. Its totient is φ = 104765253120.

The previous prime is 203210100101. The next prime is 203210100139. The reversal of 203210100105 is 501001012302.

It is not a de Polignac number, because 203210100105 - 2² = 203210100101 is a prime.

It is a super-2 number, since 2×203210100105² (a number of 23 digits) contains 22 as substring.

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

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 1448667 + ... + 1582736.

It is an arithmetic number, because the mean of its divisors is an integer number (10503814860).

Almost surely, 2^203210100105 is an apocalyptic number.

It is an amenable number.

203210100105 is a deficient number, since it is larger than the sum of its proper divisors (132911975415).

203210100105 is a wasteful number, since it uses less digits than its factorization.

203210100105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031561.

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 203210100105 its reverse (501001012302), we get a palindrome (704211112407).

The spelling of 203210100105 in words is "two hundred three billion, two hundred ten million, one hundred thousand, one hundred five".