1021001221121 has 8 divisors (see below), whose sum is σ = 1167146755200. Its totient is φ = 874927741248.

The previous prime is 1021001221117. The next prime is 1021001221127. The reversal of 1021001221121 is 1211221001201.

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 1021001221121 - 2² = 1021001221117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021001221096 and 1021001221105.

It is not an unprimeable number, because it can be changed into a prime (1021001221127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17983181 + ... + 18039866.

It is an arithmetic number, because the mean of its divisors is an integer number (145893344400).

Almost surely, 2^{1021001221121} is an apocalyptic number.

It is an amenable number.

1021001221121 is a deficient number, since it is larger than the sum of its proper divisors (146145534079).

1021001221121 is an equidigital number, since it uses as much as digits as its factorization.

1021001221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36027103.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021001221121 its reverse (1211221001201), we get a palindrome (2232222222322).

The spelling of 1021001221121 in words is "one trillion, twenty-one billion, one million, two hundred twenty-one thousand, one hundred twenty-one".