2001402044261 has 2 divisors, whose sum is σ = 2001402044262. Its totient is φ = 2001402044260.

The previous prime is 2001402044251. The next prime is 2001402044267. The reversal of 2001402044261 is 1624402041002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1614853851361 + 386548192900 = 1270769^2 + 621730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001402044261 is a prime.

It is a super-2 number, since 2×2001402044261² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2001402044261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001402044267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000701022130 + 1000701022131.

It is an arithmetic number, because the mean of its divisors is an integer number (1000701022131).

Almost surely, 2^{2001402044261} is an apocalyptic number.

It is an amenable number.

2001402044261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001402044261 is an equidigital number, since it uses as much as digits as its factorization.

2001402044261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 2001402044261 its reverse (1624402041002), we get a palindrome (3625804085263).

The spelling of 2001402044261 in words is "two trillion, one billion, four hundred two million, forty-four thousand, two hundred sixty-one".