1010120091 has 16 divisors (see below), whose sum is σ = 1390982400. Its totient is φ = 651539808.

The previous prime is 1010120029. The next prime is 1010120101. The reversal of 1010120091 is 1900210101.

It is a de Polignac number, because none of the positive numbers 2^k-1010120091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1010120091.

It is not an unprimeable number, because it can be changed into a prime (1010120011) 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, 5551 + ... + 45288.

It is an arithmetic number, because the mean of its divisors is an integer number (86936400).

Almost surely, 2^1010120091 is an apocalyptic number.

1010120091 is a deficient number, since it is larger than the sum of its proper divisors (380862309).

1010120091 is a wasteful number, since it uses less digits than its factorization.

1010120091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51058.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 1010120091 is about 31782.3864900042. The cubic root of 1010120091 is about 1003.3620476349.

Adding to 1010120091 its reverse (1900210101), we get a palindrome (2910330192).

The spelling of 1010120091 in words is "one billion, ten million, one hundred twenty thousand, ninety-one".