21323222012310 has 128 divisors (see below), whose sum is σ = 54032632049664. Its totient is φ = 5378937062400.

The previous prime is 21323222012299. The next prime is 21323222012311. The reversal of 21323222012310 is 1321022232312.

It is a super-2 number, since 2×21323222012310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323222012311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6524274 + ... + 9231066.

It is an arithmetic number, because the mean of its divisors is an integer number (422129937888).

Almost surely, 2^{21323222012310} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21323222012310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27016316024832).

21323222012310 is an abundant number, since it is smaller than the sum of its proper divisors (32709410037354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21323222012310 is a wasteful number, since it uses less digits than its factorization.

21323222012310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707038.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21323222012310 its reverse (1321022232312), we get a palindrome (22644244244622).

The spelling of 21323222012310 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred twenty-two million, twelve thousand, three hundred ten".