1226100161 has 16 divisors (see below), whose sum is σ = 1446950400. Its totient is φ = 1024254720.

The previous prime is 1226100157. The next prime is 1226100167. The reversal of 1226100161 is 1610016221.

It is a cyclic number.

It is not a de Polignac number, because 1226100161 - 2² = 1226100157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1226100167) 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 15 ways as a sum of consecutive naturals, for example, 12665 + ... + 51113.

It is an arithmetic number, because the mean of its divisors is an integer number (90434400).

Almost surely, 2^1226100161 is an apocalyptic number.

1226100161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1226100161 is a deficient number, since it is larger than the sum of its proper divisors (220850239).

1226100161 is a wasteful number, since it uses less digits than its factorization.

1226100161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38696.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1226100161 is about 35015.7130585684. The cubic root of 1226100161 is about 1070.3076999594.

Adding to 1226100161 its reverse (1610016221), we get a palindrome (2836116382).

The spelling of 1226100161 in words is "one billion, two hundred twenty-six million, one hundred thousand, one hundred sixty-one".