21322400243213 has 16 divisors (see below), whose sum is σ = 21802894176000. Its totient is φ = 20848024866240.

The previous prime is 21322400243167. The next prime is 21322400243237. The reversal of 21322400243213 is 31234200422312.

It is a cyclic number.

It is not a de Polignac number, because 21322400243213 - 2³⁴ = 21305220374029 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 (21322400243813) 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, 1159895 + ... + 6632507.

It is an arithmetic number, because the mean of its divisors is an integer number (1362680886000).

Almost surely, 2^{21322400243213} is an apocalyptic number.

It is an amenable number.

21322400243213 is a deficient number, since it is larger than the sum of its proper divisors (480493932787).

21322400243213 is a wasteful number, since it uses less digits than its factorization.

21322400243213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473172.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21322400243213 its reverse (31234200422312), we get a palindrome (52556600665525).

The spelling of 21322400243213 in words is "twenty-one trillion, three hundred twenty-two billion, four hundred million, two hundred forty-three thousand, two hundred thirteen".