21002130021233 has 16 divisors (see below), whose sum is σ = 22174571733504. Its totient is φ = 19867279406400.

The previous prime is 21002130021227. The next prime is 21002130021269. The reversal of 21002130021233 is 33212003120012.

It is a cyclic number.

It is not a de Polignac number, because 21002130021233 - 2¹² = 21002130017137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002130021203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39727910 + ... + 40253087.

It is an arithmetic number, because the mean of its divisors is an integer number (1385910733344).

Almost surely, 2^{21002130021233} is an apocalyptic number.

It is an amenable number.

21002130021233 is a deficient number, since it is larger than the sum of its proper divisors (1172441712271).

21002130021233 is a wasteful number, since it uses less digits than its factorization.

21002130021233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79981232.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21002130021233 its reverse (33212003120012), we get a palindrome (54214133141245).

The spelling of 21002130021233 in words is "twenty-one trillion, two billion, one hundred thirty million, twenty-one thousand, two hundred thirty-three".