121196819 has 2 divisors, whose sum is σ = 121196820. Its totient is φ = 121196818.

The previous prime is 121196809. The next prime is 121196827. The reversal of 121196819 is 918691121.

It is a strong prime.

It is an emirp because it is prime and its reverse (918691121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121196819 is a prime.

It is a super-2 number, since 2×121196819² = 29377337871437522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121196809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60598409 + 60598410.

It is an arithmetic number, because the mean of its divisors is an integer number (60598410).

Almost surely, 2^121196819 is an apocalyptic number.

121196819 is a deficient number, since it is larger than the sum of its proper divisors (1).

121196819 is an equidigital number, since it uses as much as digits as its factorization.

121196819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 38.

The square root of 121196819 is about 11008.9426831099. The cubic root of 121196819 is about 494.8767764562.

The spelling of 121196819 in words is "one hundred twenty-one million, one hundred ninety-six thousand, eight hundred nineteen".