121751530739 has 2 divisors, whose sum is σ = 121751530740. Its totient is φ = 121751530738.

The previous prime is 121751530697. The next prime is 121751530741. The reversal of 121751530739 is 937035157121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121751530739 - 2¹⁶ = 121751465203 is a prime.

It is a super-2 number, since 2×121751530739² (a number of 23 digits) contains 22 as substring.

Together with 121751530741, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121751530739.

It is not a weakly prime, because it can be changed into another prime (121751530799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60875765369 + 60875765370.

It is an arithmetic number, because the mean of its divisors is an integer number (60875765370).

Almost surely, 2^121751530739 is an apocalyptic number.

121751530739 is a deficient number, since it is larger than the sum of its proper divisors (1).

121751530739 is an equidigital number, since it uses as much as digits as its factorization.

121751530739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 198450, while the sum is 44.

The spelling of 121751530739 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred thirty thousand, seven hundred thirty-nine".