1101221012123 has 4 divisors (see below), whose sum is σ = 1104694895760. Its totient is φ = 1097747128488.

The previous prime is 1101221012107. The next prime is 1101221012159. The reversal of 1101221012123 is 3212101221011.

It is a happy number.

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 1101221012123 - 2⁴ = 1101221012107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101221012173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1736941343 + ... + 1736941976.

It is an arithmetic number, because the mean of its divisors is an integer number (276173723940).

Almost surely, 2^{1101221012123} is an apocalyptic number.

1101221012123 is a deficient number, since it is larger than the sum of its proper divisors (3473883637).

1101221012123 is an equidigital number, since it uses as much as digits as its factorization.

1101221012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3473883636.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1101221012123 its reverse (3212101221011), we get a palindrome (4313322233134).

The spelling of 1101221012123 in words is "one trillion, one hundred one billion, two hundred twenty-one million, twelve thousand, one hundred twenty-three".