121840872007 has 2 divisors, whose sum is σ = 121840872008. Its totient is φ = 121840872006.

The previous prime is 121840871983. The next prime is 121840872061. The reversal of 121840872007 is 700278048121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121840872007 - 2³⁵ = 87481133639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121840872407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60920436003 + 60920436004.

It is an arithmetic number, because the mean of its divisors is an integer number (60920436004).

Almost surely, 2^121840872007 is an apocalyptic number.

121840872007 is a deficient number, since it is larger than the sum of its proper divisors (1).

121840872007 is an equidigital number, since it uses as much as digits as its factorization.

121840872007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 40.

The spelling of 121840872007 in words is "one hundred twenty-one billion, eight hundred forty million, eight hundred seventy-two thousand, seven".