1001210211121 has 2 divisors, whose sum is σ = 1001210211122. Its totient is φ = 1001210211120.

The previous prime is 1001210211077. The next prime is 1001210211173. The reversal of 1001210211121 is 1211120121001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680781759025 + 320428452096 = 825095^2 + 566064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001210211121 - 2¹¹ = 1001210209073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001210211191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500605105560 + 500605105561.

It is an arithmetic number, because the mean of its divisors is an integer number (500605105561).

Almost surely, 2^{1001210211121} is an apocalyptic number.

It is an amenable number.

1001210211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001210211121 is an equidigital number, since it uses as much as digits as its factorization.

1001210211121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1001210211121 its reverse (1211120121001), we get a palindrome (2212330332122).

The spelling of 1001210211121 in words is "one trillion, one billion, two hundred ten million, two hundred eleven thousand, one hundred twenty-one".