121084771256639 has 2 divisors, whose sum is σ = 121084771256640. Its totient is φ = 121084771256638.

The previous prime is 121084771256599. The next prime is 121084771256671. The reversal of 121084771256639 is 936652177480121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121084771256639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121084771256539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60542385628319 + 60542385628320.

It is an arithmetic number, because the mean of its divisors is an integer number (60542385628320).

It is a 1-persistent number, because it is pandigital, but 2⋅121084771256639 = 242169542513278 is not.

Almost surely, 2^{121084771256639} is an apocalyptic number.

121084771256639 is a deficient number, since it is larger than the sum of its proper divisors (1).

121084771256639 is an equidigital number, since it uses as much as digits as its factorization.

121084771256639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 121084771256639 in words is "one hundred twenty-one trillion, eighty-four billion, seven hundred seventy-one million, two hundred fifty-six thousand, six hundred thirty-nine".