721011020110127 has 2 divisors, whose sum is σ = 721011020110128. Its totient is φ = 721011020110126.

The previous prime is 721011020110123. The next prime is 721011020110181.

721011020110127 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 721011020110127 - 2² = 721011020110123 is a prime.

It is a super-2 number, since 2×721011020110127² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 721011020110096 and 721011020110105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721011020110123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360505510055063 + 360505510055064.

It is an arithmetic number, because the mean of its divisors is an integer number (360505510055064).

Almost surely, 2^{721011020110127} is an apocalyptic number.

721011020110127 is a deficient number, since it is larger than the sum of its proper divisors (1).

721011020110127 is an equidigital number, since it uses as much as digits as its factorization.

721011020110127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 26.

The spelling of 721011020110127 in words is "seven hundred twenty-one trillion, eleven billion, twenty million, one hundred ten thousand, one hundred twenty-seven".