21042232235 has 16 divisors (see below), whose sum is σ = 26964023040. Its totient is φ = 15729006720.

The previous prime is 21042232229. The next prime is 21042232241. The reversal of 21042232235 is 53223224012.

It is an interprime number because it is at equal distance from previous prime (21042232229) and next prime (21042232241).

It is not a de Polignac number, because 21042232235 - 2¹⁰ = 21042231211 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2336132 + ... + 2345121.

It is an arithmetic number, because the mean of its divisors is an integer number (1685251440).

Almost surely, 2^21042232235 is an apocalyptic number.

21042232235 is a deficient number, since it is larger than the sum of its proper divisors (5921790805).

21042232235 is a wasteful number, since it uses less digits than its factorization.

21042232235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4681318.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21042232235 its reverse (53223224012), we get a palindrome (74265456247).

The spelling of 21042232235 in words is "twenty-one billion, forty-two million, two hundred thirty-two thousand, two hundred thirty-five".