1221244203441 has 32 divisors (see below), whose sum is σ = 1711440339840. Its totient is φ = 773639161344.

The previous prime is 1221244203427. The next prime is 1221244203463. The reversal of 1221244203441 is 1443024421221.

It is not a de Polignac number, because 1221244203441 - 2⁷ = 1221244203313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221244203399 and 1221244203408.

It is not an unprimeable number, because it can be changed into a prime (1221244203041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71438491 + ... + 71455583.

It is an arithmetic number, because the mean of its divisors is an integer number (53482510620).

Almost surely, 2^{1221244203441} is an apocalyptic number.

It is an amenable number.

1221244203441 is a deficient number, since it is larger than the sum of its proper divisors (490196136399).

1221244203441 is a wasteful number, since it uses less digits than its factorization.

1221244203441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32145.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 1221244203441 its reverse (1443024421221), we get a palindrome (2664268624662).

The spelling of 1221244203441 in words is "one trillion, two hundred twenty-one billion, two hundred forty-four million, two hundred three thousand, four hundred forty-one".