1103210121 has 16 divisors (see below), whose sum is σ = 1677279744. Its totient is φ = 638962944.

The previous prime is 1103210099. The next prime is 1103210131. The reversal of 1103210121 is 1210123011.

It is not a de Polignac number, because 1103210121 - 2¹⁴ = 1103193737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1103210097 and 1103210106.

It is not an unprimeable number, because it can be changed into a prime (1103210131) 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, 831321 + ... + 832646.

It is an arithmetic number, because the mean of its divisors is an integer number (104829984).

Almost surely, 2^1103210121 is an apocalyptic number.

It is an amenable number.

1103210121 is a deficient number, since it is larger than the sum of its proper divisors (574069623).

1103210121 is a wasteful number, since it uses less digits than its factorization.

1103210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664000.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1103210121 is about 33214.6070426853. The cubic root of 1103210121 is about 1033.2833050933.

Adding to 1103210121 its reverse (1210123011), we get a palindrome (2313333132).

The spelling of 1103210121 in words is "one billion, one hundred three million, two hundred ten thousand, one hundred twenty-one".