1012200091 has 16 divisors (see below), whose sum is σ = 1246009600. Its totient is φ = 802817568.

The previous prime is 1012200089. The next prime is 1012200103. The reversal of 1012200091 is 1900022101.

It is not a de Polignac number, because 1012200091 - 2¹ = 1012200089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012200191) 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, 82776 + ... + 94213.

It is an arithmetic number, because the mean of its divisors is an integer number (77875600).

Almost surely, 2^1012200091 is an apocalyptic number.

1012200091 is a deficient number, since it is larger than the sum of its proper divisors (233809509).

1012200091 is a wasteful number, since it uses less digits than its factorization.

1012200091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177058.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1012200091 is about 31815.0921890854. The cubic root of 1012200091 is about 1004.0502701638.

Adding to 1012200091 its reverse (1900022101), we get a palindrome (2912222192).

The spelling of 1012200091 in words is "one billion, twelve million, two hundred thousand, ninety-one".