21030102210133 has 4 divisors (see below), whose sum is σ = 21030133795020. Its totient is φ = 21030070625248.

The previous prime is 21030102210127. The next prime is 21030102210137. The reversal of 21030102210133 is 33101220103012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10960383558609 + 10069718651524 = 3310647^2 + 3173282^2 .

It is a cyclic number.

It is not a de Polignac number, because 21030102210133 - 2²¹ = 21030100112981 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 21030102210133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030102210137) 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, 14771710 + ... + 16132687.

It is an arithmetic number, because the mean of its divisors is an integer number (5257533448755).

Almost surely, 2^{21030102210133} is an apocalyptic number.

It is an amenable number.

21030102210133 is a deficient number, since it is larger than the sum of its proper divisors (31584887).

21030102210133 is an equidigital number, since it uses as much as digits as its factorization.

21030102210133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31584886.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21030102210133 its reverse (33101220103012), we get a palindrome (54131322313145).

The spelling of 21030102210133 in words is "twenty-one trillion, thirty billion, one hundred two million, two hundred ten thousand, one hundred thirty-three".