11434213121 has 2 divisors, whose sum is σ = 11434213122. Its totient is φ = 11434213120.

The previous prime is 11434213117. The next prime is 11434213139. The reversal of 11434213121 is 12131243411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10538049025 + 896164096 = 102655^2 + 29936^2 .

It is a cyclic number.

It is not a de Polignac number, because 11434213121 - 2² = 11434213117 is a prime.

It is not a weakly prime, because it can be changed into another prime (11434213621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5717106560 + 5717106561.

It is an arithmetic number, because the mean of its divisors is an integer number (5717106561).

Almost surely, 2^11434213121 is an apocalyptic number.

It is an amenable number.

11434213121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11434213121 is an equidigital number, since it uses as much as digits as its factorization.

11434213121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

Adding to 11434213121 its reverse (12131243411), we get a palindrome (23565456532).

The spelling of 11434213121 in words is "eleven billion, four hundred thirty-four million, two hundred thirteen thousand, one hundred twenty-one".