21134433443111 has 4 divisors (see below), whose sum is σ = 22246772045400. Its totient is φ = 20022094840824.

The previous prime is 21134433443099. The next prime is 21134433443197. The reversal of 21134433443111 is 11134433443112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21134433443111 - 2¹⁴ = 21134433426727 is a prime.

It is a super-2 number, since 2×21134433443111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134433440111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556169301116 + ... + 556169301153.

It is an arithmetic number, because the mean of its divisors is an integer number (5561693011350).

Almost surely, 2^{21134433443111} is an apocalyptic number.

21134433443111 is a deficient number, since it is larger than the sum of its proper divisors (1112338602289).

21134433443111 is a wasteful number, since it uses less digits than its factorization.

21134433443111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112338602288.

The product of its digits is 41472, while the sum is 35.

Adding to 21134433443111 its reverse (11134433443112), we get a palindrome (32268866886223).

Subtracting from 21134433443111 its reverse (11134433443112), we obtain a palindrome (9999999999999).

The spelling of 21134433443111 in words is "twenty-one trillion, one hundred thirty-four billion, four hundred thirty-three million, four hundred forty-three thousand, one hundred eleven".