11667235121 has 2 divisors, whose sum is σ = 11667235122. Its totient is φ = 11667235120.

The previous prime is 11667235091. The next prime is 11667235127. The reversal of 11667235121 is 12153276611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8703957025 + 2963278096 = 93295^2 + 54436^2 .

It is a cyclic number.

It is not a de Polignac number, because 11667235121 - 2¹⁴ = 11667218737 is a prime.

It is a super-2 number, since 2×11667235121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11667235127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833617560 + 5833617561.

It is an arithmetic number, because the mean of its divisors is an integer number (5833617561).

Almost surely, 2^11667235121 is an apocalyptic number.

It is an amenable number.

11667235121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11667235121 is an equidigital number, since it uses as much as digits as its factorization.

11667235121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 35.

The spelling of 11667235121 in words is "eleven billion, six hundred sixty-seven million, two hundred thirty-five thousand, one hundred twenty-one".