121004401477 has 2 divisors, whose sum is σ = 121004401478. Its totient is φ = 121004401476.

The previous prime is 121004401387. The next prime is 121004401519. The reversal of 121004401477 is 774104400121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71414010756 + 49590390721 = 267234^2 + 222689^2 .

It is a cyclic number.

It is not a de Polignac number, because 121004401477 - 2²³ = 120996012869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121004461477) 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, 60502200738 + 60502200739.

It is an arithmetic number, because the mean of its divisors is an integer number (60502200739).

Almost surely, 2^121004401477 is an apocalyptic number.

It is an amenable number.

121004401477 is a deficient number, since it is larger than the sum of its proper divisors (1).

121004401477 is an equidigital number, since it uses as much as digits as its factorization.

121004401477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 31.

Adding to 121004401477 its reverse (774104400121), we get a palindrome (895108801598).

The spelling of 121004401477 in words is "one hundred twenty-one billion, four million, four hundred one thousand, four hundred seventy-seven".