1021120113 has 16 divisors (see below), whose sum is σ = 1552473216. Its totient is φ = 591417600.

The previous prime is 1021120103. The next prime is 1021120159. The reversal of 1021120113 is 3110211201.

It is not a de Polignac number, because 1021120113 - 2⁵ = 1021120081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021120103) 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 15 ways as a sum of consecutive naturals, for example, 769413 + ... + 770738.

It is an arithmetic number, because the mean of its divisors is an integer number (97029576).

Almost surely, 2^1021120113 is an apocalyptic number.

1021120113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1021120113 is a deficient number, since it is larger than the sum of its proper divisors (531353103).

1021120113 is a wasteful number, since it uses less digits than its factorization.

1021120113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540184.

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

The square root of 1021120113 is about 31954.9700829151. The cubic root of 1021120113 is about 1006.9910490052.

Adding to 1021120113 its reverse (3110211201), we get a palindrome (4131331314).

The spelling of 1021120113 in words is "one billion, twenty-one million, one hundred twenty thousand, one hundred thirteen".