2001010421 has 2 divisors, whose sum is σ = 2001010422. Its totient is φ = 2001010420.

The previous prime is 2001010393. The next prime is 2001010439. The reversal of 2001010421 is 1240101002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1839466321 + 161544100 = 42889^2 + 12710^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001010421 - 2³⁰ = 927268597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001010621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000505210 + 1000505211.

It is an arithmetic number, because the mean of its divisors is an integer number (1000505211).

Almost surely, 2^2001010421 is an apocalyptic number.

It is an amenable number.

2001010421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001010421 is an equidigital number, since it uses as much as digits as its factorization.

2001010421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2001010421 is about 44732.6549737437. The cubic root of 2001010421 is about 1260.1331892884.

Adding to 2001010421 its reverse (1240101002), we get a palindrome (3241111423).

The spelling of 2001010421 in words is "two billion, one million, ten thousand, four hundred twenty-one".