10211419781 has 2 divisors, whose sum is σ = 10211419782. Its totient is φ = 10211419780.

The previous prime is 10211419753. The next prime is 10211419849. The reversal of 10211419781 is 18791411201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6094144225 + 4117275556 = 78065^2 + 64166^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211419781 - 2¹⁰ = 10211418757 is a prime.

It is a super-2 number, since 2×10211419781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211419081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105709890 + 5105709891.

It is an arithmetic number, because the mean of its divisors is an integer number (5105709891).

Almost surely, 2^10211419781 is an apocalyptic number.

It is an amenable number.

10211419781 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211419781 is an equidigital number, since it uses as much as digits as its factorization.

10211419781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 35.

The spelling of 10211419781 in words is "ten billion, two hundred eleven million, four hundred nineteen thousand, seven hundred eighty-one".