1221131041224 has 16 divisors (see below), whose sum is σ = 3052827603120. Its totient is φ = 407043680400.

The previous prime is 1221131041211. The next prime is 1221131041271. The reversal of 1221131041224 is 4221401311221.

It is a super-3 number, since 3×1221131041224³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 50880460051 = 1221131041224 / (1 + 2 + 2 + 1 + 1 + 3 + 1 + 0 + 4 + 1 + 2 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 1221131041194 and 1221131041203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25440230002 + ... + 25440230049.

It is an arithmetic number, because the mean of its divisors is an integer number (190801725195).

Almost surely, 2^{1221131041224} is an apocalyptic number.

It is an amenable number.

1221131041224 is an abundant number, since it is smaller than the sum of its proper divisors (1831696561896).

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

1221131041224 is a wasteful number, since it uses less digits than its factorization.

1221131041224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50880460060 (or 50880460056 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1221131041224 its reverse (4221401311221), we get a palindrome (5442532352445).

The spelling of 1221131041224 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-one million, forty-one thousand, two hundred twenty-four".