121221092849 has 2 divisors, whose sum is σ = 121221092850. Its totient is φ = 121221092848.

The previous prime is 121221092813. The next prime is 121221092851. The reversal of 121221092849 is 948290122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90733488400 + 30487604449 = 301220^2 + 174607^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221092849 - 2¹⁶ = 121221027313 is a prime.

Together with 121221092851, 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 (121221092249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610546424 + 60610546425.

It is an arithmetic number, because the mean of its divisors is an integer number (60610546425).

Almost surely, 2^121221092849 is an apocalyptic number.

It is an amenable number.

121221092849 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221092849 is an equidigital number, since it uses as much as digits as its factorization.

121221092849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The spelling of 121221092849 in words is "one hundred twenty-one billion, two hundred twenty-one million, ninety-two thousand, eight hundred forty-nine".