12221023331440 has 160 divisors (see below), whose sum is σ = 35623004981760. Its totient is φ = 3787869619200.

The previous prime is 12221023331401. The next prime is 12221023331459. The reversal of 12221023331440 is 4413332012221.

It is a super-2 number, since 2×12221023331440² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 12221023331399 and 12221023331408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4439071 + ... + 6644350.

It is an arithmetic number, because the mean of its divisors is an integer number (222643781136).

Almost surely, 2^{12221023331440} is an apocalyptic number.

12221023331440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221023331440 is an abundant number, since it is smaller than the sum of its proper divisors (23401981650320).

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

12221023331440 is a wasteful number, since it uses less digits than its factorization.

12221023331440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11083631 (or 11083625 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 12221023331440 its reverse (4413332012221), we get a palindrome (16634355343661).

The spelling of 12221023331440 in words is "twelve trillion, two hundred twenty-one billion, twenty-three million, three hundred thirty-one thousand, four hundred forty".