11767320121 has 4 divisors (see below), whose sum is σ = 11767933044. Its totient is φ = 11766707200.

The previous prime is 11767320109. The next prime is 11767320127. The reversal of 11767320121 is 12102376711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1565310096 + 10202010025 = 39564^2 + 101005^2 .

It is a cyclic number.

It is not a de Polignac number, because 11767320121 - 2¹³ = 11767311929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11767320127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276700 + ... + 316381.

It is an arithmetic number, because the mean of its divisors is an integer number (2941983261).

Almost surely, 2^11767320121 is an apocalyptic number.

It is an amenable number.

11767320121 is a deficient number, since it is larger than the sum of its proper divisors (612923).

11767320121 is an equidigital number, since it uses as much as digits as its factorization.

11767320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612922.

The product of its (nonzero) digits is 3528, while the sum is 31.

Adding to 11767320121 its reverse (12102376711), we get a palindrome (23869696832).

The spelling of 11767320121 in words is "eleven billion, seven hundred sixty-seven million, three hundred twenty thousand, one hundred twenty-one".