1000221121021 has 8 divisors (see below), whose sum is σ = 1049742000000. Its totient is φ = 951202992432.

The previous prime is 1000221120961. The next prime is 1000221121069. The reversal of 1000221121021 is 1201211220001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000221121021 - 2¹¹ = 1000221118973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000221120992 and 1000221121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000221121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125683521 + ... + 125691478.

It is an arithmetic number, because the mean of its divisors is an integer number (131217750000).

Almost surely, 2^{1000221121021} is an apocalyptic number.

It is an amenable number.

1000221121021 is a deficient number, since it is larger than the sum of its proper divisors (49520878979).

1000221121021 is a wasteful number, since it uses less digits than its factorization.

1000221121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251375195.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1000221121021 its reverse (1201211220001), we get a palindrome (2201432341022).

The spelling of 1000221121021 in words is "one trillion, two hundred twenty-one million, one hundred twenty-one thousand, twenty-one".