1113210121 has 8 divisors (see below), whose sum is σ = 1134650664. Its totient is φ = 1091973120.

The previous prime is 1113210103. The next prime is 1113210127. The reversal of 1113210121 is 1210123111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 76370121 + 1036840000 = 8739^2 + 32200^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1113210121 - 2¹⁵ = 1113177353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1113210127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39820 + ... + 61741.

It is an arithmetic number, because the mean of its divisors is an integer number (141831333).

Almost surely, 2^1113210121 is an apocalyptic number.

It is an amenable number.

1113210121 is a deficient number, since it is larger than the sum of its proper divisors (21440543).

1113210121 is a wasteful number, since it uses less digits than its factorization.

1113210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101771.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1113210121 is about 33364.8036259769. The cubic root of 1113210121 is about 1036.3959695582.

Adding to 1113210121 its reverse (1210123111), we get a palindrome (2323333232).

The spelling of 1113210121 in words is "one billion, one hundred thirteen million, two hundred ten thousand, one hundred twenty-one".