11122113421 has 2 divisors, whose sum is σ = 11122113422. Its totient is φ = 11122113420.

The previous prime is 11122113407. The next prime is 11122113433. The reversal of 11122113421 is 12431122111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8296659396 + 2825454025 = 91086^2 + 53155^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122113421 - 2⁵ = 11122113389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122113491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561056710 + 5561056711.

It is an arithmetic number, because the mean of its divisors is an integer number (5561056711).

Almost surely, 2^11122113421 is an apocalyptic number.

It is an amenable number.

11122113421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122113421 is an equidigital number, since it uses as much as digits as its factorization.

11122113421 is an evil number, because the sum of its binary digits is even.

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

Adding to 11122113421 its reverse (12431122111), we get a palindrome (23553235532).

It can be divided in two parts, 111221134 and 21, that added together give a triangular number (111221155 = T₁₄₉₁₄).

The spelling of 11122113421 in words is "eleven billion, one hundred twenty-two million, one hundred thirteen thousand, four hundred twenty-one".