121420212113 has 2 divisors, whose sum is σ = 121420212114. Its totient is φ = 121420212112.

The previous prime is 121420212037. The next prime is 121420212127. The reversal of 121420212113 is 311212024121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96294157969 + 25126054144 = 310313^2 + 158512^2 .

It is a cyclic number.

It is not a de Polignac number, because 121420212113 - 2¹⁸ = 121419949969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121420212913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60710106056 + 60710106057.

It is an arithmetic number, because the mean of its divisors is an integer number (60710106057).

Almost surely, 2^121420212113 is an apocalyptic number.

It is an amenable number.

121420212113 is a deficient number, since it is larger than the sum of its proper divisors (1).

121420212113 is an equidigital number, since it uses as much as digits as its factorization.

121420212113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121420212113 its reverse (311212024121), we get a palindrome (432632236234).

The spelling of 121420212113 in words is "one hundred twenty-one billion, four hundred twenty million, two hundred twelve thousand, one hundred thirteen".