121220011013 has 2 divisors, whose sum is σ = 121220011014. Its totient is φ = 121220011012.

The previous prime is 121220010997. The next prime is 121220011043. The reversal of 121220011013 is 310110022121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88293368164 + 32926642849 = 297142^2 + 181457^2 .

It is an emirp because it is prime and its reverse (310110022121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121220011013 - 2⁴ = 121220010997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220011043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610005506 + 60610005507.

It is an arithmetic number, because the mean of its divisors is an integer number (60610005507).

Almost surely, 2^121220011013 is an apocalyptic number.

It is an amenable number.

121220011013 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220011013 is an equidigital number, since it uses as much as digits as its factorization.

121220011013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121220011013 its reverse (310110022121), we get a palindrome (431330033134).

The spelling of 121220011013 in words is "one hundred twenty-one billion, two hundred twenty million, eleven thousand, thirteen".