1001221121201 has 8 divisors (see below), whose sum is σ = 1144272725760. Its totient is φ = 858174520608.

The previous prime is 1001221121171. The next prime is 1001221121239. The reversal of 1001221121201 is 1021211221001.

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 1001221121201 - 2³⁰ = 1000147379377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001221121261) 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, 811961 + ... + 1631478.

It is an arithmetic number, because the mean of its divisors is an integer number (143034090720).

Almost surely, 2^{1001221121201} is an apocalyptic number.

It is an amenable number.

1001221121201 is a deficient number, since it is larger than the sum of its proper divisors (143051604559).

1001221121201 is an equidigital number, since it uses as much as digits as its factorization.

1001221121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501983.

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

Adding to 1001221121201 its reverse (1021211221001), we get a palindrome (2022432342202).

The spelling of 1001221121201 in words is "one trillion, one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred one".