1221434223024 has 160 divisors (see below), whose sum is σ = 3258487443456. Its totient is φ = 394040033280.

The previous prime is 1221434223013. The next prime is 1221434223143. The reversal of 1221434223024 is 4203224341221.

It is a super-2 number, since 2×1221434223024² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221434222982 and 1221434223000.

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, 499154569 + ... + 499157015.

Almost surely, 2^{1221434223024} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221434223024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1629243721728).

1221434223024 is an abundant number, since it is smaller than the sum of its proper divisors (2037053220432).

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

1221434223024 is a wasteful number, since it uses less digits than its factorization.

1221434223024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4883 (or 4877 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 1221434223024 its reverse (4203224341221), we get a palindrome (5424658564245).

The spelling of 1221434223024 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-four million, two hundred twenty-three thousand, twenty-four".