21320200122013 has 8 divisors (see below), whose sum is σ = 23170859696600. Its totient is φ = 19499632573248.

The previous prime is 21320200121981. The next prime is 21320200122029. The reversal of 21320200122013 is 31022100202312.

It can be written as a sum of positive squares in 4 ways, for example, as 2264067921124 + 19056132200889 = 1504682^2 + 4365333^2 .

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 21320200122013 - 2⁵ = 21320200121981 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 (21320200128013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7523004978 + ... + 7523007811.

It is an arithmetic number, because the mean of its divisors is an integer number (2896357462075).

Almost surely, 2^{21320200122013} is an apocalyptic number.

It is an amenable number.

21320200122013 is a deficient number, since it is larger than the sum of its proper divisors (1850659574587).

21320200122013 is a wasteful number, since it uses less digits than its factorization.

21320200122013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15046012911.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21320200122013 its reverse (31022100202312), we get a palindrome (52342300324325).

The spelling of 21320200122013 in words is "twenty-one trillion, three hundred twenty billion, two hundred million, one hundred twenty-two thousand, thirteen".