1001210220121 has 16 divisors (see below), whose sum is σ = 1037742831360. Its totient is φ = 964813227840.

The previous prime is 1001210220103. The next prime is 1001210220203. The reversal of 1001210220121 is 1210220121001.

It is a cyclic number.

It is not a de Polignac number, because 1001210220121 - 2⁷ = 1001210219993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001210260121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34664316 + ... + 34693186.

It is an arithmetic number, because the mean of its divisors is an integer number (64858926960).

Almost surely, 2^{1001210220121} is an apocalyptic number.

It is an amenable number.

1001210220121 is a deficient number, since it is larger than the sum of its proper divisors (36532611239).

1001210220121 is a wasteful number, since it uses less digits than its factorization.

1001210220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31176.

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

Adding to 1001210220121 its reverse (1210220121001), we get a palindrome (2211430341122).

The spelling of 1001210220121 in words is "one trillion, one billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-one".