121886738513 has 2 divisors, whose sum is σ = 121886738514. Its totient is φ = 121886738512.

The previous prime is 121886738489. The next prime is 121886738537. The reversal of 121886738513 is 315837688121.

It is a balanced prime because it is at equal distance from previous prime (121886738489) and next prime (121886738537).

It can be written as a sum of positive squares in only one way, i.e., 73988352064 + 47898386449 = 272008^2 + 218857^2 .

It is a cyclic number.

It is not a de Polignac number, because 121886738513 - 2²⁸ = 121618303057 is a prime.

It is not a weakly prime, because it can be changed into another prime (121886738543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60943369256 + 60943369257.

It is an arithmetic number, because the mean of its divisors is an integer number (60943369257).

Almost surely, 2^121886738513 is an apocalyptic number.

It is an amenable number.

121886738513 is a deficient number, since it is larger than the sum of its proper divisors (1).

121886738513 is an equidigital number, since it uses as much as digits as its factorization.

121886738513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 53.

The spelling of 121886738513 in words is "one hundred twenty-one billion, eight hundred eighty-six million, seven hundred thirty-eight thousand, five hundred thirteen".