121236487 has 2 divisors, whose sum is σ = 121236488. Its totient is φ = 121236486.

The previous prime is 121236431. The next prime is 121236491. The reversal of 121236487 is 784632121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121236487 - 2¹⁹ = 120712199 is a prime.

It is equal to p_6908083 and since 121236487 and 6908083 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121236187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60618243 + 60618244.

It is an arithmetic number, because the mean of its divisors is an integer number (60618244).

Almost surely, 2^121236487 is an apocalyptic number.

121236487 is a deficient number, since it is larger than the sum of its proper divisors (1).

121236487 is an equidigital number, since it uses as much as digits as its factorization.

121236487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 121236487 is about 11010.7441619538. The cubic root of 121236487 is about 494.9307620058.

It can be divided in two parts, 1212 and 36487, that multiplied together give a palindrome (44222244).

The spelling of 121236487 in words is "one hundred twenty-one million, two hundred thirty-six thousand, four hundred eighty-seven".