121210111221103 has 4 divisors (see below), whose sum is σ = 121214068357648. Its totient is φ = 121206154084560.

The previous prime is 121210111221079. The next prime is 121210111221137. The reversal of 121210111221103 is 301122111012121.

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

It is a cyclic number.

It is not a de Polignac number, because 121210111221103 - 2¹⁷ = 121210111090031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210111221203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1978522326 + ... + 1978583587.

It is an arithmetic number, because the mean of its divisors is an integer number (30303517089412).

Almost surely, 2^{121210111221103} is an apocalyptic number.

121210111221103 is a deficient number, since it is larger than the sum of its proper divisors (3957136545).

121210111221103 is an equidigital number, since it uses as much as digits as its factorization.

121210111221103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957136544.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 121210111221103 its reverse (301122111012121), we get a palindrome (422332222233224).

The spelling of 121210111221103 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred eleven million, two hundred twenty-one thousand, one hundred three".