2001130121 has 2 divisors, whose sum is σ = 2001130122. Its totient is φ = 2001130120.

The previous prime is 2001130099. The next prime is 2001130127. The reversal of 2001130121 is 1210311002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1238265721 + 762864400 = 35189^2 + 27620^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001130121 - 2¹⁸ = 2000867977 is a prime.

It is a super-2 number, since 2×2001130121² = 8009043522346949282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001130127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000565060 + 1000565061.

It is an arithmetic number, because the mean of its divisors is an integer number (1000565061).

Almost surely, 2^2001130121 is an apocalyptic number.

It is an amenable number.

2001130121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001130121 is an equidigital number, since it uses as much as digits as its factorization.

2001130121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2001130121 is about 44733.9929024897. The cubic root of 2001130121 is about 1260.1583157501.

Adding to 2001130121 its reverse (1210311002), we get a palindrome (3211441123).

The spelling of 2001130121 in words is "two billion, one million, one hundred thirty thousand, one hundred twenty-one".