1101221200123 has 4 divisors (see below), whose sum is σ = 1201332218328. Its totient is φ = 1001110181920.

The previous prime is 1101221200081. The next prime is 1101221200267. The reversal of 1101221200123 is 3210021221011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101221200123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1101221200097 and 1101221200106.

It is not an unprimeable number, because it can be changed into a prime (1101221207123) 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, 50055509086 + ... + 50055509107.

It is an arithmetic number, because the mean of its divisors is an integer number (300333054582).

Almost surely, 2^{1101221200123} is an apocalyptic number.

1101221200123 is a deficient number, since it is larger than the sum of its proper divisors (100111018205).

1101221200123 is a wasteful number, since it uses less digits than its factorization.

1101221200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100111018204.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1101221200123 its reverse (3210021221011), we get a palindrome (4311242421134).

The spelling of 1101221200123 in words is "one trillion, one hundred one billion, two hundred twenty-one million, two hundred thousand, one hundred twenty-three".