203111330204021 has 8 divisors (see below), whose sum is σ = 204414509636760. Its totient is φ = 201808270729728.

The previous prime is 203111330204011. The next prime is 203111330204033. The reversal of 203111330204021 is 120402033111302.

It can be written as a sum of positive squares in 4 ways, for example, as 97821772659121 + 105289557544900 = 9890489^2 + 10261070^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203111330204021 - 2²² = 203111326009717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203111330204011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26591156 + ... + 33366333.

It is an arithmetic number, because the mean of its divisors is an integer number (25551813704595).

Almost surely, 2^{203111330204021} is an apocalyptic number.

It is an amenable number.

203111330204021 is a deficient number, since it is larger than the sum of its proper divisors (1303179432739).

203111330204021 is a wasteful number, since it uses less digits than its factorization.

203111330204021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59979223.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 203111330204021 its reverse (120402033111302), we get a palindrome (323513363315323).

The spelling of 203111330204021 in words is "two hundred three trillion, one hundred eleven billion, three hundred thirty million, two hundred four thousand, twenty-one".