1000221121244 has 24 divisors (see below), whose sum is σ = 1829202025728. Its totient is φ = 478086885360.

The previous prime is 1000221121243. The next prime is 1000221121261. The reversal of 1000221121244 is 4421211220001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000221121243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61856162 + ... + 61872329.

It is an arithmetic number, because the mean of its divisors is an integer number (76216751072).

Almost surely, 2^{1000221121244} is an apocalyptic number.

It is an amenable number.

1000221121244 is a deficient number, since it is larger than the sum of its proper divisors (828980904484).

1000221121244 is a wasteful number, since it uses less digits than its factorization.

1000221121244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123728585 (or 123728583 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1000221121244 its reverse (4421211220001), we get a palindrome (5421432341245).

The spelling of 1000221121244 in words is "one trillion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred forty-four".