1101221221121 has 16 divisors (see below), whose sum is σ = 1313483179008. Its totient is φ = 902709522000.

The previous prime is 1101221221069. The next prime is 1101221221123. The reversal of 1101221221121 is 1211221221011.

It is a cyclic number.

It is not a de Polignac number, because 1101221221121 - 2²² = 1101217026817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1101221221121.

It is not an unprimeable number, because it can be changed into a prime (1101221221123) 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, 357506 + ... + 1526516.

It is an arithmetic number, because the mean of its divisors is an integer number (82092698688).

Almost surely, 2^{1101221221121} is an apocalyptic number.

It is an amenable number.

1101221221121 is a deficient number, since it is larger than the sum of its proper divisors (212261957887).

1101221221121 is a wasteful number, since it uses less digits than its factorization.

1101221221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174892.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1101221221121 its reverse (1211221221011), we get a palindrome (2312442442132).

The spelling of 1101221221121 in words is "one trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".