121221101103 has 16 divisors (see below), whose sum is σ = 162138278016. Its totient is φ = 80559124640.

The previous prime is 121221101087. The next prime is 121221101137. The reversal of 121221101103 is 301101122121.

It is a cyclic number.

It is not a de Polignac number, because 121221101103 - 2⁴ = 121221101087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221101173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4369825 + ... + 4397477.

It is an arithmetic number, because the mean of its divisors is an integer number (10133642376).

Almost surely, 2^121221101103 is an apocalyptic number.

121221101103 is a deficient number, since it is larger than the sum of its proper divisors (40917176913).

121221101103 is a wasteful number, since it uses less digits than its factorization.

121221101103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32214.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121221101103 its reverse (301101122121), we get a palindrome (422322223224).

The spelling of 121221101103 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, one hundred three".