21233013101983 has 4 divisors (see below), whose sum is σ = 21241375850920. Its totient is φ = 21224650353048.

The previous prime is 21233013101977. The next prime is 21233013101999. The reversal of 21233013101983 is 38910131033212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233013101983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233013101383) 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, 4181370660 + ... + 4181375737.

It is an arithmetic number, because the mean of its divisors is an integer number (5310343962730).

Almost surely, 2^{21233013101983} is an apocalyptic number.

21233013101983 is a deficient number, since it is larger than the sum of its proper divisors (8362748937).

21233013101983 is an equidigital number, since it uses as much as digits as its factorization.

21233013101983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8362748936.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 21233013101983 in words is "twenty-one trillion, two hundred thirty-three billion, thirteen million, one hundred one thousand, nine hundred eighty-three".