11640213121 has 2 divisors, whose sum is σ = 11640213122. Its totient is φ = 11640213120.

The previous prime is 11640213113. The next prime is 11640213127. The reversal of 11640213121 is 12131204611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7282232896 + 4357980225 = 85336^2 + 66015^2 .

It is a cyclic number.

It is not a de Polignac number, because 11640213121 - 2³ = 11640213113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11640213092 and 11640213101.

It is not a weakly prime, because it can be changed into another prime (11640213127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5820106560 + 5820106561.

It is an arithmetic number, because the mean of its divisors is an integer number (5820106561).

Almost surely, 2^11640213121 is an apocalyptic number.

It is an amenable number.

11640213121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11640213121 is an equidigital number, since it uses as much as digits as its factorization.

11640213121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11640213121 its reverse (12131204611), we get a palindrome (23771417732).

The spelling of 11640213121 in words is "eleven billion, six hundred forty million, two hundred thirteen thousand, one hundred twenty-one".