111020210010121 has 2 divisors, whose sum is σ = 111020210010122. Its totient is φ = 111020210010120.

The previous prime is 111020210010079. The next prime is 111020210010197. The reversal of 111020210010121 is 121010012020111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110303031375625 + 717178634496 = 10502525^2 + 846864^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020210010121 - 2²¹ = 111020207912969 is a prime.

It is not a weakly prime, because it can be changed into another prime (111020210014121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510105005060 + 55510105005061.

It is an arithmetic number, because the mean of its divisors is an integer number (55510105005061).

Almost surely, 2^{111020210010121} is an apocalyptic number.

It is an amenable number.

111020210010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020210010121 is an equidigital number, since it uses as much as digits as its factorization.

111020210010121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111020210010121 its reverse (121010012020111), we get a palindrome (232030222030232).

The spelling of 111020210010121 in words is "one hundred eleven trillion, twenty billion, two hundred ten million, ten thousand, one hundred twenty-one".