21223034013240 has 96 divisors (see below), whose sum is σ = 68975436703680. Its totient is φ = 5659428462336.

The previous prime is 21223034013217. The next prime is 21223034013283. The reversal of 21223034013240 is 4231043032212.

21223034013240 is a `hidden beast` number, since 2 + 1 + 2 + 230 + 3 + 401 + 3 + 24 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73774162 + ... + 74061278.

It is an arithmetic number, because the mean of its divisors is an integer number (718494132330).

Almost surely, 2^{21223034013240} is an apocalyptic number.

21223034013240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223034013240 is an abundant number, since it is smaller than the sum of its proper divisors (47752402690440).

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

21223034013240 is a wasteful number, since it uses less digits than its factorization.

21223034013240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492461 (or 492454 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21223034013240 its reverse (4231043032212), we get a palindrome (25454077045452).

The spelling of 21223034013240 in words is "twenty-one trillion, two hundred twenty-three billion, thirty-four million, thirteen thousand, two hundred forty".