111210001000121 has 4 divisors (see below), whose sum is σ = 117751765764852. Its totient is φ = 104668236235392.

The previous prime is 111210001000057. The next prime is 111210001000129. The reversal of 111210001000121 is 121000100012111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101486705031721 + 9723295968400 = 10074061^2 + 3118220^2 .

It is a cyclic number.

It is not a de Polignac number, because 111210001000121 - 2⁶ = 111210001000057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111210001000129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3270882382340 + ... + 3270882382373.

It is an arithmetic number, because the mean of its divisors is an integer number (29437941441213).

Almost surely, 2^{111210001000121} is an apocalyptic number.

It is an amenable number.

111210001000121 is a deficient number, since it is larger than the sum of its proper divisors (6541764764731).

111210001000121 is an equidigital number, since it uses as much as digits as its factorization.

111210001000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541764764730.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111210001000121 its reverse (121000100012111), we get a palindrome (232210101012232).

It can be divided in two parts, 11 and 1210001000121, that multiplied together give a palindrome (13310011001331).

The spelling of 111210001000121 in words is "one hundred eleven trillion, two hundred ten billion, one million, one hundred twenty-one", and thus it is an aban number.