121704351751 has 2 divisors, whose sum is σ = 121704351752. Its totient is φ = 121704351750.

The previous prime is 121704351739. The next prime is 121704351787. The reversal of 121704351751 is 157153407121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121704351751 - 2⁷ = 121704351623 is a prime.

It is a super-2 number, since 2×121704351751² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121704351751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121704351701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60852175875 + 60852175876.

It is an arithmetic number, because the mean of its divisors is an integer number (60852175876).

Almost surely, 2^121704351751 is an apocalyptic number.

121704351751 is a deficient number, since it is larger than the sum of its proper divisors (1).

121704351751 is an equidigital number, since it uses as much as digits as its factorization.

121704351751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 37.

Adding to 121704351751 its reverse (157153407121), we get a palindrome (278857758872).

It can be divided in two parts, 12170 and 4351751, that added together give a square (4363921 = 2089²).

The spelling of 121704351751 in words is "one hundred twenty-one billion, seven hundred four million, three hundred fifty-one thousand, seven hundred fifty-one".