11111210121029 has 2 divisors, whose sum is σ = 11111210121030. Its totient is φ = 11111210121028.

The previous prime is 11111210120981. The next prime is 11111210121059. The reversal of 11111210121029 is 92012101211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8368205056225 + 2743005064804 = 2892785^2 + 1656202^2 .

It is an emirp because it is prime and its reverse (92012101211111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111210121029 - 2¹² = 11111210116933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111210120995 and 11111210121013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111210121059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555605060514 + 5555605060515.

It is an arithmetic number, because the mean of its divisors is an integer number (5555605060515).

Almost surely, 2^{11111210121029} is an apocalyptic number.

It is an amenable number.

11111210121029 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111210121029 is an equidigital number, since it uses as much as digits as its factorization.

11111210121029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 23.

The spelling of 11111210121029 in words is "eleven trillion, one hundred eleven billion, two hundred ten million, one hundred twenty-one thousand, twenty-nine".