20012001011291 has 2 divisors, whose sum is σ = 20012001011292. Its totient is φ = 20012001011290.

The previous prime is 20012001011287. The next prime is 20012001011333. The reversal of 20012001011291 is 19211010021002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012001011291 - 2² = 20012001011287 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012001011491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006000505645 + 10006000505646.

It is an arithmetic number, because the mean of its divisors is an integer number (10006000505646).

Almost surely, 2^{20012001011291} is an apocalyptic number.

20012001011291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012001011291 is an equidigital number, since it uses as much as digits as its factorization.

20012001011291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 20012001011291 its reverse (19211010021002), we get a palindrome (39223011032293).

The spelling of 20012001011291 in words is "twenty trillion, twelve billion, one million, eleven thousand, two hundred ninety-one".