203213101 has 16 divisors (see below), whose sum is σ = 255435264. Its totient is φ = 157359744.

The previous prime is 203213083. The next prime is 203213137. The reversal of 203213101 is 101312302.

It is a cyclic number.

It is not a de Polignac number, because 203213101 - 2⁷ = 203212973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203211101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19480 + ... + 28033.

It is an arithmetic number, because the mean of its divisors is an integer number (15964704).

Almost surely, 2^203213101 is an apocalyptic number.

It is an amenable number.

203213101 is a deficient number, since it is larger than the sum of its proper divisors (52222163).

203213101 is a wasteful number, since it uses less digits than its factorization.

203213101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47580.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 203213101 is about 14255.2832662140. The cubic root of 203213101 is about 587.9186462871.

Adding to 203213101 its reverse (101312302), we get a palindrome (304525403).

The spelling of 203213101 in words is "two hundred three million, two hundred thirteen thousand, one hundred one".