121451334989 has 2 divisors, whose sum is σ = 121451334990. Its totient is φ = 121451334988.

The previous prime is 121451334973. The next prime is 121451335037. The reversal of 121451334989 is 989433154121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87352758025 + 34098576964 = 295555^2 + 184658^2 .

It is an emirp because it is prime and its reverse (989433154121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121451334989 - 2⁴ = 121451334973 is a prime.

It is a super-2 number, since 2×121451334989² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121451337989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60725667494 + 60725667495.

It is an arithmetic number, because the mean of its divisors is an integer number (60725667495).

Almost surely, 2^121451334989 is an apocalyptic number.

It is an amenable number.

121451334989 is a deficient number, since it is larger than the sum of its proper divisors (1).

121451334989 is an equidigital number, since it uses as much as digits as its factorization.

121451334989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 50.

The spelling of 121451334989 in words is "one hundred twenty-one billion, four hundred fifty-one million, three hundred thirty-four thousand, nine hundred eighty-nine".