203122100021203 has 4 divisors (see below), whose sum is σ = 221587745477688. Its totient is φ = 184656454564720.

The previous prime is 203122100021201. The next prime is 203122100021207. The reversal of 203122100021203 is 302120001221302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 203122100021203 - 2¹ = 203122100021201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203122100021201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9232822728226 + ... + 9232822728247.

It is an arithmetic number, because the mean of its divisors is an integer number (55396936369422).

Almost surely, 2^{203122100021203} is an apocalyptic number.

203122100021203 is a deficient number, since it is larger than the sum of its proper divisors (18465645456485).

203122100021203 is a wasteful number, since it uses less digits than its factorization.

203122100021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18465645456484.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 203122100021203 its reverse (302120001221302), we get a palindrome (505242101242505).

The spelling of 203122100021203 in words is "two hundred three trillion, one hundred twenty-two billion, one hundred million, twenty-one thousand, two hundred three".