11868196121 has 4 divisors (see below), whose sum is σ = 12384204672. Its totient is φ = 11352187572.

The previous prime is 11868196069. The next prime is 11868196169. The reversal of 11868196121 is 12169186811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12169186811 = 587 ⋅20731153.

It is a cyclic number.

It is not a de Polignac number, because 11868196121 - 2¹⁸ = 11867933977 is a prime.

It is a super-3 number, since 3×11868196121³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11868190121) 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, 258004241 + ... + 258004286.

It is an arithmetic number, because the mean of its divisors is an integer number (3096051168).

Almost surely, 2^11868196121 is an apocalyptic number.

It is an amenable number.

11868196121 is a deficient number, since it is larger than the sum of its proper divisors (516008551).

11868196121 is an equidigital number, since it uses as much as digits as its factorization.

11868196121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516008550.

The product of its digits is 41472, while the sum is 44.

The spelling of 11868196121 in words is "eleven billion, eight hundred sixty-eight million, one hundred ninety-six thousand, one hundred twenty-one".