121201199969 has 2 divisors, whose sum is σ = 121201199970. Its totient is φ = 121201199968.

The previous prime is 121201199921. The next prime is 121201199971. The reversal of 121201199969 is 969991102121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81033023569 + 40168176400 = 284663^2 + 200420^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201199969 - 2³² = 116906232673 is a prime.

It is a super-2 number, since 2×121201199969² (a number of 23 digits) contains 22 as substring.

Together with 121201199971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121201199269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600599984 + 60600599985.

It is an arithmetic number, because the mean of its divisors is an integer number (60600599985).

Almost surely, 2^121201199969 is an apocalyptic number.

It is an amenable number.

121201199969 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201199969 is an equidigital number, since it uses as much as digits as its factorization.

121201199969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 50.

The spelling of 121201199969 in words is "one hundred twenty-one billion, two hundred one million, one hundred ninety-nine thousand, nine hundred sixty-nine".