21213244435 has 8 divisors (see below), whose sum is σ = 25936193520. Its totient is φ = 16650395424.

The previous prime is 21213244433. The next prime is 21213244489. The reversal of 21213244435 is 53444231212.

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 21213244435 - 2¹ = 21213244433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21213244397 and 21213244406.

It is not an unprimeable number, because it can be changed into a prime (21213244433) 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, 40024725 + ... + 40025254.

It is an arithmetic number, because the mean of its divisors is an integer number (3242024190).

Almost surely, 2^21213244435 is an apocalyptic number.

21213244435 is a deficient number, since it is larger than the sum of its proper divisors (4722949085).

21213244435 is an equidigital number, since it uses as much as digits as its factorization.

21213244435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80050037.

The product of its digits is 23040, while the sum is 31.

Adding to 21213244435 its reverse (53444231212), we get a palindrome (74657475647).

The spelling of 21213244435 in words is "twenty-one billion, two hundred thirteen million, two hundred forty-four thousand, four hundred thirty-five".