121210881049 has 2 divisors, whose sum is σ = 121210881050. Its totient is φ = 121210881048.

The previous prime is 121210881047. The next prime is 121210881089. The reversal of 121210881049 is 940188012121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93076857225 + 28134023824 = 305085^2 + 167732^2 .

It is an emirp because it is prime and its reverse (940188012121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121210881049 - 2¹ = 121210881047 is a prime.

Together with 121210881047, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121210880999 and 121210881017.

It is not a weakly prime, because it can be changed into another prime (121210881041) 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, 60605440524 + 60605440525.

It is an arithmetic number, because the mean of its divisors is an integer number (60605440525).

Almost surely, 2^121210881049 is an apocalyptic number.

It is an amenable number.

121210881049 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210881049 is an equidigital number, since it uses as much as digits as its factorization.

121210881049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 37.

The spelling of 121210881049 in words is "one hundred twenty-one billion, two hundred ten million, eight hundred eighty-one thousand, forty-nine".