1021120109 has 8 divisors (see below), whose sum is σ = 1036316160. Its totient is φ = 1005980976.

The previous prime is 1021120103. The next prime is 1021120159. The reversal of 1021120109 is 9010211201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021120109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021120103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22619 + ... + 50535.

It is an arithmetic number, because the mean of its divisors is an integer number (129539520).

Almost surely, 2^1021120109 is an apocalyptic number.

It is an amenable number.

1021120109 is a deficient number, since it is larger than the sum of its proper divisors (15196051).

1021120109 is an equidigital number, since it uses as much as digits as its factorization.

1021120109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28459.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 1021120109 is about 31954.9700203270. The cubic root of 1021120109 is about 1006.9910476903.

It can be divided in two parts, 102 and 1120109, that added together give a palindrome (1120211).

The spelling of 1021120109 in words is "one billion, twenty-one million, one hundred twenty thousand, one hundred nine".