121161056519 has 2 divisors, whose sum is σ = 121161056520. Its totient is φ = 121161056518.

The previous prime is 121161056431. The next prime is 121161056539. The reversal of 121161056519 is 915650161121.

It is a strong prime.

It is an emirp because it is prime and its reverse (915650161121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121161056519 - 2¹² = 121161052423 is a prime.

It is a super-2 number, since 2×121161056519² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121161056539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60580528259 + 60580528260.

It is an arithmetic number, because the mean of its divisors is an integer number (60580528260).

Almost surely, 2^121161056519 is an apocalyptic number.

121161056519 is a deficient number, since it is larger than the sum of its proper divisors (1).

121161056519 is an equidigital number, since it uses as much as digits as its factorization.

121161056519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 38.

The spelling of 121161056519 in words is "one hundred twenty-one billion, one hundred sixty-one million, fifty-six thousand, five hundred nineteen".