21101023202213 has 8 divisors (see below), whose sum is σ = 21616115405976. Its totient is φ = 20585951622400.

The previous prime is 21101023202179. The next prime is 21101023202227. The reversal of 21101023202213 is 31220232010112.

It can be written as a sum of positive squares in 4 ways, for example, as 2048739169 + 21098974463044 = 45263^2 + 4593362^2 .

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 21101023202213 - 2¹⁰ = 21101023201189 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 (21101023202263) 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, 3074618 + ... + 7187163.

It is an arithmetic number, because the mean of its divisors is an integer number (2702014425747).

Almost surely, 2^{21101023202213} is an apocalyptic number.

It is an amenable number.

21101023202213 is a deficient number, since it is larger than the sum of its proper divisors (515092203763).

21101023202213 is a wasteful number, since it uses less digits than its factorization.

21101023202213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10311975.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21101023202213 its reverse (31220232010112), we get a palindrome (52321255212325).

The spelling of 21101023202213 in words is "twenty-one trillion, one hundred one billion, twenty-three million, two hundred two thousand, two hundred thirteen".