203311132220021 has 4 divisors (see below), whose sum is σ = 232355579680032. Its totient is φ = 174266684760012.

The previous prime is 203311132219967. The next prime is 203311132220039. The reversal of 203311132220021 is 120022231113302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203311132220021 - 2⁴² = 198913085708917 is a prime.

It is a super-2 number, since 2×203311132220021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203311132223021) 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, 14522223729995 + ... + 14522223730008.

It is an arithmetic number, because the mean of its divisors is an integer number (58088894920008).

Almost surely, 2^{203311132220021} is an apocalyptic number.

It is an amenable number.

203311132220021 is a deficient number, since it is larger than the sum of its proper divisors (29044447460011).

203311132220021 is an equidigital number, since it uses as much as digits as its factorization.

203311132220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29044447460010.

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

Adding to 203311132220021 its reverse (120022231113302), we get a palindrome (323333363333323).

The spelling of 203311132220021 in words is "two hundred three trillion, three hundred eleven billion, one hundred thirty-two million, two hundred twenty thousand, twenty-one".