21002131233133 has 8 divisors (see below), whose sum is σ = 21915345700800. Its totient is φ = 20088923292768.

The previous prime is 21002131233107. The next prime is 21002131233203. The reversal of 21002131233133 is 33133213120012.

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 21002131233133 - 2⁵ = 21002131233101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21002131233098 and 21002131233107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002131233533) 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, 5631073 + ... + 8585641.

It is an arithmetic number, because the mean of its divisors is an integer number (2739418212600).

Almost surely, 2^{21002131233133} is an apocalyptic number.

21002131233133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21002131233133 is a deficient number, since it is larger than the sum of its proper divisors (913214467667).

21002131233133 is a wasteful number, since it uses less digits than its factorization.

21002131233133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263651.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21002131233133 its reverse (33133213120012), we get a palindrome (54135344353145).

The spelling of 21002131233133 in words is "twenty-one trillion, two billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred thirty-three".