11403421111 has 2 divisors, whose sum is σ = 11403421112. Its totient is φ = 11403421110.

The previous prime is 11403421079. The next prime is 11403421123. The reversal of 11403421111 is 11112430411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11403421111 - 2⁵ = 11403421079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11403421511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5701710555 + 5701710556.

It is an arithmetic number, because the mean of its divisors is an integer number (5701710556).

Almost surely, 2^11403421111 is an apocalyptic number.

11403421111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11403421111 is an equidigital number, since it uses as much as digits as its factorization.

11403421111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 11403421111 its reverse (11112430411), we get a palindrome (22515851522).

The spelling of 11403421111 in words is "eleven billion, four hundred three million, four hundred twenty-one thousand, one hundred eleven".