1101221320123 has 2 divisors, whose sum is σ = 1101221320124. Its totient is φ = 1101221320122.

The previous prime is 1101221320109. The next prime is 1101221320153. The reversal of 1101221320123 is 3210231221011.

It is a weak prime.

It is an emirp because it is prime and its reverse (3210231221011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101221320123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1101221320123.

It is not a weakly prime, because it can be changed into another prime (1101221320103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550610660061 + 550610660062.

It is an arithmetic number, because the mean of its divisors is an integer number (550610660062).

Almost surely, 2^{1101221320123} is an apocalyptic number.

1101221320123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101221320123 is an equidigital number, since it uses as much as digits as its factorization.

1101221320123 is an evil number, because the sum of its binary digits is even.

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

Adding to 1101221320123 its reverse (3210231221011), we get a palindrome (4311452541134).

The spelling of 1101221320123 in words is "one trillion, one hundred one billion, two hundred twenty-one million, three hundred twenty thousand, one hundred twenty-three".