121420523239 has 2 divisors, whose sum is σ = 121420523240. Its totient is φ = 121420523238.

The previous prime is 121420523233. The next prime is 121420523249. The reversal of 121420523239 is 932325024121.

It is a weak prime.

It is an emirp because it is prime and its reverse (932325024121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121420523239 - 2⁷ = 121420523111 is a prime.

It is a super-2 number, since 2×121420523239² (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 (121420523233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60710261619 + 60710261620.

It is an arithmetic number, because the mean of its divisors is an integer number (60710261620).

Almost surely, 2^121420523239 is an apocalyptic number.

121420523239 is a deficient number, since it is larger than the sum of its proper divisors (1).

121420523239 is an equidigital number, since it uses as much as digits as its factorization.

121420523239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 121420523239 in words is "one hundred twenty-one billion, four hundred twenty million, five hundred twenty-three thousand, two hundred thirty-nine".