21021101013133 has 16 divisors (see below), whose sum is σ = 23422439617920. Its totient is φ = 18732021465024.

The previous prime is 21021101013083. The next prime is 21021101013217. The reversal of 21021101013133 is 33131010112012.

It is a de Polignac number, because none of the positive numbers 2^k-21021101013133 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 21021101013133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021101013233) 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, 2025441 + ... + 6792982.

It is an arithmetic number, because the mean of its divisors is an integer number (1463902476120).

Almost surely, 2^{21021101013133} is an apocalyptic number.

It is an amenable number.

21021101013133 is a deficient number, since it is larger than the sum of its proper divisors (2401338604787).

21021101013133 is a wasteful number, since it uses less digits than its factorization.

21021101013133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8824788.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21021101013133 its reverse (33131010112012), we get a palindrome (54152111125145).

The spelling of 21021101013133 in words is "twenty-one trillion, twenty-one billion, one hundred one million, thirteen thousand, one hundred thirty-three".