121031111385479 has 2 divisors, whose sum is σ = 121031111385480. Its totient is φ = 121031111385478.

The previous prime is 121031111385467. The next prime is 121031111385539. The reversal of 121031111385479 is 974583111130121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121031111385479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121031111385179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60515555692739 + 60515555692740.

It is an arithmetic number, because the mean of its divisors is an integer number (60515555692740).

Almost surely, 2^{121031111385479} is an apocalyptic number.

121031111385479 is a deficient number, since it is larger than the sum of its proper divisors (1).

121031111385479 is an equidigital number, since it uses as much as digits as its factorization.

121031111385479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 47.

The spelling of 121031111385479 in words is "one hundred twenty-one trillion, thirty-one billion, one hundred eleven million, three hundred eighty-five thousand, four hundred seventy-nine".