1001120121121 has 8 divisors (see below), whose sum is σ = 1004332694400. Its totient is φ = 997909514448.

The previous prime is 1001120121119. The next prime is 1001120121139. The reversal of 1001120121121 is 1211210211001.

It is a happy number.

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 1001120121121 - 2¹ = 1001120121119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001120121151) 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, 531510 + ... + 1511536.

It is an arithmetic number, because the mean of its divisors is an integer number (125541586800).

Almost surely, 2^{1001120121121} is an apocalyptic number.

It is an amenable number.

1001120121121 is a deficient number, since it is larger than the sum of its proper divisors (3212573279).

1001120121121 is an equidigital number, since it uses as much as digits as its factorization.

1001120121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983303.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1001120121121 its reverse (1211210211001), we get a palindrome (2212330332122).

The spelling of 1001120121121 in words is "one trillion, one billion, one hundred twenty million, one hundred twenty-one thousand, one hundred twenty-one".