121302131549 has 2 divisors, whose sum is σ = 121302131550. Its totient is φ = 121302131548.

The previous prime is 121302131521. The next prime is 121302131563. The reversal of 121302131549 is 945131203121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109749751225 + 11552380324 = 331285^2 + 107482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121302131549 is a prime.

It is a super-2 number, since 2×121302131549² (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 (121302131579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60651065774 + 60651065775.

It is an arithmetic number, because the mean of its divisors is an integer number (60651065775).

Almost surely, 2^121302131549 is an apocalyptic number.

It is an amenable number.

121302131549 is a deficient number, since it is larger than the sum of its proper divisors (1).

121302131549 is an equidigital number, since it uses as much as digits as its factorization.

121302131549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 121302131549 in words is "one hundred twenty-one billion, three hundred two million, one hundred thirty-one thousand, five hundred forty-nine".