10421128111 has 2 divisors, whose sum is σ = 10421128112. Its totient is φ = 10421128110.

The previous prime is 10421128099. The next prime is 10421128139. The reversal of 10421128111 is 11182112401.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (11182112401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10421128111 - 2⁵ = 10421128079 is a prime.

It is a super-2 number, since 2×10421128111² (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 (10421128411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210564055 + 5210564056.

It is an arithmetic number, because the mean of its divisors is an integer number (5210564056).

Almost surely, 2^10421128111 is an apocalyptic number.

10421128111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10421128111 is an equidigital number, since it uses as much as digits as its factorization.

10421128111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 10421128111 in words is "ten billion, four hundred twenty-one million, one hundred twenty-eight thousand, one hundred eleven".