121421023237 has 2 divisors, whose sum is σ = 121421023238. Its totient is φ = 121421023236.

The previous prime is 121421023201. The next prime is 121421023253. The reversal of 121421023237 is 732320124121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96945672321 + 24475350916 = 311361^2 + 156446^2 .

It is a cyclic number.

It is not a de Polignac number, because 121421023237 - 2¹⁹ = 121420498949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121421023267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60710511618 + 60710511619.

It is an arithmetic number, because the mean of its divisors is an integer number (60710511619).

Almost surely, 2^121421023237 is an apocalyptic number.

It is an amenable number.

121421023237 is a deficient number, since it is larger than the sum of its proper divisors (1).

121421023237 is an equidigital number, since it uses as much as digits as its factorization.

121421023237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 121421023237 its reverse (732320124121), we get a palindrome (853741147358).

The spelling of 121421023237 in words is "one hundred twenty-one billion, four hundred twenty-one million, twenty-three thousand, two hundred thirty-seven".