21113311033 has 8 divisors (see below), whose sum is σ = 21467911680. Its totient is φ = 20758984080.

The previous prime is 21113311031. The next prime is 21113311039. The reversal of 21113311033 is 33011331112.

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 21113311033 - 2¹ = 21113311031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21113311033.

It is not an unprimeable number, because it can be changed into a prime (21113311031) 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, 90216 + ... + 224422.

It is an arithmetic number, because the mean of its divisors is an integer number (2683488960).

Almost surely, 2^21113311033 is an apocalyptic number.

It is an amenable number.

21113311033 is a deficient number, since it is larger than the sum of its proper divisors (354600647).

21113311033 is a wasteful number, since it uses less digits than its factorization.

21113311033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136847.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21113311033 its reverse (33011331112), we get a palindrome (54124642145).

The spelling of 21113311033 in words is "twenty-one billion, one hundred thirteen million, three hundred eleven thousand, thirty-three".