111101021010121 has 2 divisors, whose sum is σ = 111101021010122. Its totient is φ = 111101021010120.

The previous prime is 111101021010103. The next prime is 111101021010163. The reversal of 111101021010121 is 121010120101111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92327865170121 + 18773155840000 = 9608739^2 + 4332800^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101021010121 - 2¹⁷ = 111101020879049 is a prime.

It is not a weakly prime, because it can be changed into another prime (111101021010821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550510505060 + 55550510505061.

It is an arithmetic number, because the mean of its divisors is an integer number (55550510505061).

Almost surely, 2^{111101021010121} is an apocalyptic number.

It is an amenable number.

111101021010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101021010121 is an equidigital number, since it uses as much as digits as its factorization.

111101021010121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111101021010121 its reverse (121010120101111), we get a palindrome (232111141111232).

The spelling of 111101021010121 in words is "one hundred eleven trillion, one hundred one billion, twenty-one million, ten thousand, one hundred twenty-one".