1103121320121 has 72 divisors (see below), whose sum is σ = 1714046390784. Its totient is φ = 682337779200.

The previous prime is 1103121320117. The next prime is 1103121320159. The reversal of 1103121320121 is 1210231213011.

1103121320121 is a `hidden beast` number, since 1 + 10 + 312 + 1 + 320 + 1 + 21 = 666.

It is not a de Polignac number, because 1103121320121 - 2² = 1103121320117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1103121320094 and 1103121320103.

It is not an unprimeable number, because it can be changed into a prime (1103121320921) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 95494296 + ... + 95505846.

It is an arithmetic number, because the mean of its divisors is an integer number (23806199872).

Almost surely, 2^{1103121320121} is an apocalyptic number.

It is an amenable number.

1103121320121 is a deficient number, since it is larger than the sum of its proper divisors (610925070663).

1103121320121 is a wasteful number, since it uses less digits than its factorization.

1103121320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11991 (or 11951 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1103121320121 its reverse (1210231213011), we get a palindrome (2313352533132).

The spelling of 1103121320121 in words is "one trillion, one hundred three billion, one hundred twenty-one million, three hundred twenty thousand, one hundred twenty-one".