11001212211 has 32 divisors (see below), whose sum is σ = 16957152000. Its totient is φ = 6274039680.

The previous prime is 11001212177. The next prime is 11001212219. The reversal of 11001212211 is 11221210011.

It is not a de Polignac number, because 11001212211 - 2⁷ = 11001212083 is a prime.

It is a super-2 number, since 2×11001212211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11001212219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34545 + ... + 152301.

It is an arithmetic number, because the mean of its divisors is an integer number (529911000).

Almost surely, 2^11001212211 is an apocalyptic number.

11001212211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11001212211 is a deficient number, since it is larger than the sum of its proper divisors (5955939789).

11001212211 is a wasteful number, since it uses less digits than its factorization.

11001212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117939.

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

Adding to 11001212211 its reverse (11221210011), we get a palindrome (22222422222).

The spelling of 11001212211 in words is "eleven billion, one million, two hundred twelve thousand, two hundred eleven".