121004401387 has 2 divisors, whose sum is σ = 121004401388. Its totient is φ = 121004401386.

The previous prime is 121004401379. The next prime is 121004401477. The reversal of 121004401387 is 783104400121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121004401387 - 2³ = 121004401379 is a prime.

It is not a weakly prime, because it can be changed into another prime (121004401187) 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, 60502200693 + 60502200694.

It is an arithmetic number, because the mean of its divisors is an integer number (60502200694).

Almost surely, 2^121004401387 is an apocalyptic number.

121004401387 is a deficient number, since it is larger than the sum of its proper divisors (1).

121004401387 is an equidigital number, since it uses as much as digits as its factorization.

121004401387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 121004401387 in words is "one hundred twenty-one billion, four million, four hundred one thousand, three hundred eighty-seven".