121221000149 has 2 divisors, whose sum is σ = 121221000150. Its totient is φ = 121221000148.

The previous prime is 121221000097. The next prime is 121221000169. The reversal of 121221000149 is 941000122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110772480625 + 10448519524 = 332825^2 + 102218^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221000149 - 2²⁸ = 120952564693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221000169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610500074 + 60610500075.

It is an arithmetic number, because the mean of its divisors is an integer number (60610500075).

Almost surely, 2^121221000149 is an apocalyptic number.

It is an amenable number.

121221000149 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221000149 is an equidigital number, since it uses as much as digits as its factorization.

121221000149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 121221000149 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred forty-nine", and thus it is an aban number.