2110121001 has 6 divisors (see below), whose sum is σ = 3047952570. Its totient is φ = 1406747328.

The previous prime is 2110120979. The next prime is 2110121011. The reversal of 2110121001 is 1001210112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1980161001 + 129960000 = 44499^2 + 11400^2 .

It is not a de Polignac number, because 2110121001 - 2²¹ = 2108023849 is a prime.

It is a super-2 number, since 2×2110121001² = 8905221277722484002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 234457889 = 2110121001 / (2 + 1 + 1 + 0 + 1 + 2 + 1 + 0 + 0 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2110121011) 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 5 ways as a sum of consecutive naturals, for example, 117228936 + ... + 117228953.

It is an arithmetic number, because the mean of its divisors is an integer number (507992095).

Almost surely, 2^2110121001 is an apocalyptic number.

It is an amenable number.

2110121001 is a deficient number, since it is larger than the sum of its proper divisors (937831569).

2110121001 is a wasteful number, since it uses less digits than its factorization.

2110121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234457895 (or 234457892 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2110121001 is about 45936.0533894674. The cubic root of 2110121001 is about 1282.6331295974.

Adding to 2110121001 its reverse (1001210112), we get a palindrome (3111331113).

The spelling of 2110121001 in words is "two billion, one hundred ten million, one hundred twenty-one thousand, one".