21331121203 has 8 divisors (see below), whose sum is σ = 24387746400. Its totient is φ = 18276826560.

The previous prime is 21331121197. The next prime is 21331121239. The reversal of 21331121203 is 30212113312.

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 21331121203 - 2²¹ = 21329024051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331121243) 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, 562978 + ... + 599671.

It is an arithmetic number, because the mean of its divisors is an integer number (3048468300).

Almost surely, 2^21331121203 is an apocalyptic number.

21331121203 is a deficient number, since it is larger than the sum of its proper divisors (3056625197).

21331121203 is a wasteful number, since it uses less digits than its factorization.

21331121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165277.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21331121203 its reverse (30212113312), we get a palindrome (51543234515).

The spelling of 21331121203 in words is "twenty-one billion, three hundred thirty-one million, one hundred twenty-one thousand, two hundred three".