21232111433 has 16 divisors (see below), whose sum is σ = 23246205696. Its totient is φ = 19273826880.

The previous prime is 21232111421. The next prime is 21232111441. The reversal of 21232111433 is 33411123212.

It is a cyclic number.

It is not a de Polignac number, because 21232111433 - 2⁸ = 21232111177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21232111399 and 21232111408.

It is not an unprimeable number, because it can be changed into a prime (21232111493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337460 + ... + 395402.

It is an arithmetic number, because the mean of its divisors is an integer number (1452887856).

Almost surely, 2^21232111433 is an apocalyptic number.

It is an amenable number.

21232111433 is a deficient number, since it is larger than the sum of its proper divisors (2014094263).

21232111433 is a wasteful number, since it uses less digits than its factorization.

21232111433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58424.

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

Adding to 21232111433 its reverse (33411123212), we get a palindrome (54643234645).

The spelling of 21232111433 in words is "twenty-one billion, two hundred thirty-two million, one hundred eleven thousand, four hundred thirty-three".