1221103230121 has 16 divisors (see below), whose sum is σ = 1286824739200. Its totient is φ = 1155527659008.

The previous prime is 1221103230097. The next prime is 1221103230131. The reversal of 1221103230121 is 1210323011221.

It is a cyclic number.

It is not a de Polignac number, because 1221103230121 - 2⁷ = 1221103229993 is a prime.

It is a super-2 number, since 2×1221103230121² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221103230131) 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, 97037596 + ... + 97050178.

It is an arithmetic number, because the mean of its divisors is an integer number (80426546200).

Almost surely, 2^{1221103230121} is an apocalyptic number.

It is an amenable number.

1221103230121 is a deficient number, since it is larger than the sum of its proper divisors (65721509079).

1221103230121 is a wasteful number, since it uses less digits than its factorization.

1221103230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17968.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1221103230121 its reverse (1210323011221), we get a palindrome (2431426241342).

The spelling of 1221103230121 in words is "one trillion, two hundred twenty-one billion, one hundred three million, two hundred thirty thousand, one hundred twenty-one".