38911121111 has 2 divisors, whose sum is σ = 38911121112. Its totient is φ = 38911121110.

The previous prime is 38911121107. The next prime is 38911121131. The reversal of 38911121111 is 11112111983.

38911121111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38911121111 - 2² = 38911121107 is a prime.

It is a super-2 number, since 2×38911121111² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38911121101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19455560555 + 19455560556.

It is an arithmetic number, because the mean of its divisors is an integer number (19455560556).

Almost surely, 2^38911121111 is an apocalyptic number.

38911121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

38911121111 is an equidigital number, since it uses as much as digits as its factorization.

38911121111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 29.

The spelling of 38911121111 in words is "thirty-eight billion, nine hundred eleven million, one hundred twenty-one thousand, one hundred eleven".