2001412121 has 2 divisors, whose sum is σ = 2001412122. Its totient is φ = 2001412120.

The previous prime is 2001412099. The next prime is 2001412157. The reversal of 2001412121 is 1212141002.

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., 1989606025 + 11806096 = 44605^2 + 3436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001412121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001412096 and 2001412105.

It is not a weakly prime, because it can be changed into another prime (2001412181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000706060 + 1000706061.

It is an arithmetic number, because the mean of its divisors is an integer number (1000706061).

Almost surely, 2^2001412121 is an apocalyptic number.

It is an amenable number.

2001412121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001412121 is an equidigital number, since it uses as much as digits as its factorization.

2001412121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2001412121 is about 44737.1447569020. The cubic root of 2001412121 is about 1260.2175069624.

Adding to 2001412121 its reverse (1212141002), we get a palindrome (3213553123).

The spelling of 2001412121 in words is "two billion, one million, four hundred twelve thousand, one hundred twenty-one".