2001420267731 has 2 divisors, whose sum is σ = 2001420267732. Its totient is φ = 2001420267730.

The previous prime is 2001420267719. The next prime is 2001420267761. The reversal of 2001420267731 is 1377620241002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001420267731 - 2¹⁸ = 2001420005587 is a prime.

It is a super-2 number, since 2×2001420267731² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001420267691 and 2001420267700.

It is not a weakly prime, because it can be changed into another prime (2001420267761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000710133865 + 1000710133866.

It is an arithmetic number, because the mean of its divisors is an integer number (1000710133866).

Almost surely, 2^{2001420267731} is an apocalyptic number.

2001420267731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001420267731 is an equidigital number, since it uses as much as digits as its factorization.

2001420267731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 2001420267731 in words is "two trillion, one billion, four hundred twenty million, two hundred sixty-seven thousand, seven hundred thirty-one".