1111212201 has 16 divisors (see below), whose sum is σ = 1632316608. Its totient is φ = 666792000.

The previous prime is 1111212121. The next prime is 1111212203. The reversal of 1111212201 is 1022121111.

It is not a de Polignac number, because 1111212201 - 2⁷ = 1111212073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1111212203) 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, 163366 + ... + 170031.

It is an arithmetic number, because the mean of its divisors is an integer number (102019788).

Almost surely, 2^1111212201 is an apocalyptic number.

1111212201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111212201 is a deficient number, since it is larger than the sum of its proper divisors (521104407).

1111212201 is a wasteful number, since it uses less digits than its factorization.

1111212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333512.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1111212201 is about 33334.8496471786. The cubic root of 1111212201 is about 1035.7755786776.

Adding to 1111212201 its reverse (1022121111), we get a palindrome (2133333312).

It can be divided in two parts, 1111 and 212201, that added together give a palindrome (213312).

The spelling of 1111212201 in words is "one billion, one hundred eleven million, two hundred twelve thousand, two hundred one".