21121331233 has 8 divisors (see below), whose sum is σ = 22572771552. Its totient is φ = 19693114176.

The previous prime is 21121331201. The next prime is 21121331263. The reversal of 21121331233 is 33213312112.

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 21121331233 - 2⁵ = 21121331201 is a prime.

It is a super-2 number, since 2×21121331233² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121331263) 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, 5803935 + ... + 5807572.

It is an arithmetic number, because the mean of its divisors is an integer number (2821596444).

Almost surely, 2^21121331233 is an apocalyptic number.

It is an amenable number.

21121331233 is a deficient number, since it is larger than the sum of its proper divisors (1451440319).

21121331233 is a wasteful number, since it uses less digits than its factorization.

21121331233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11611631.

The product of its digits is 648, while the sum is 22.

Adding to 21121331233 its reverse (33213312112), we get a palindrome (54334643345).

The spelling of 21121331233 in words is "twenty-one billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred thirty-three".