111020202121013 has 2 divisors, whose sum is σ = 111020202121014. Its totient is φ = 111020202121012.

The previous prime is 111020202120917. The next prime is 111020202121057. The reversal of 111020202121013 is 310121202020111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90405905272804 + 20614296848209 = 9508202^2 + 4540297^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020202121013 - 2³² = 111015907153717 is a prime.

It is a super-2 number, since 2×111020202121013² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111020202120982 and 111020202121000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111020202121093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510101060506 + 55510101060507.

It is an arithmetic number, because the mean of its divisors is an integer number (55510101060507).

Almost surely, 2^{111020202121013} is an apocalyptic number.

It is an amenable number.

111020202121013 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020202121013 is an equidigital number, since it uses as much as digits as its factorization.

111020202121013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111020202121013 its reverse (310121202020111), we get a palindrome (421141404141124).

The spelling of 111020202121013 in words is "one hundred eleven trillion, twenty billion, two hundred two million, one hundred twenty-one thousand, thirteen".