21223401321140 has 48 divisors (see below), whose sum is σ = 47295184728960. Its totient is φ = 7982626396800.

The previous prime is 21223401321079. The next prime is 21223401321167. The reversal of 21223401321140 is 4112310432212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390971411 + ... + 391025690.

It is an arithmetic number, because the mean of its divisors is an integer number (985316348520).

Almost surely, 2^{21223401321140} is an apocalyptic number.

21223401321140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223401321140 is an abundant number, since it is smaller than the sum of its proper divisors (26071783407820).

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

21223401321140 is a wasteful number, since it uses less digits than its factorization.

21223401321140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781997192 (or 781997190 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21223401321140 its reverse (4112310432212), we get a palindrome (25335711753352).

The spelling of 21223401321140 in words is "twenty-one trillion, two hundred twenty-three billion, four hundred one million, three hundred twenty-one thousand, one hundred forty".