121321011103 has 4 divisors (see below), whose sum is σ = 121470976080. Its totient is φ = 121171046128.

The previous prime is 121321011067. The next prime is 121321011113. The reversal of 121321011103 is 301110123121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301110123121 = 156127 ⋅1928623.

It is a cyclic number.

It is not a de Polignac number, because 121321011103 - 2²⁵ = 121287456671 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 (121321011113) 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, 74981275 + ... + 74982892.

It is an arithmetic number, because the mean of its divisors is an integer number (30367744020).

Almost surely, 2^121321011103 is an apocalyptic number.

121321011103 is a deficient number, since it is larger than the sum of its proper divisors (149964977).

121321011103 is an equidigital number, since it uses as much as digits as its factorization.

121321011103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149964976.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121321011103 its reverse (301110123121), we get a palindrome (422431134224).

The spelling of 121321011103 in words is "one hundred twenty-one billion, three hundred twenty-one million, eleven thousand, one hundred three".