11172207211 has 24 divisors (see below), whose sum is σ = 12691187712. Its totient is φ = 9817407600.

The previous prime is 11172207209. The next prime is 11172207217. The reversal of 11172207211 is 11270227111.

It is not a de Polignac number, because 11172207211 - 2¹ = 11172207209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11172207217) 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 23 ways as a sum of consecutive naturals, for example, 5576736 + ... + 5578738.

It is an arithmetic number, because the mean of its divisors is an integer number (528799488).

Almost surely, 2^11172207211 is an apocalyptic number.

11172207211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11172207211 is a deficient number, since it is larger than the sum of its proper divisors (1518980501).

11172207211 is a wasteful number, since it uses less digits than its factorization.

11172207211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543 (or 3532 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 25.

The spelling of 11172207211 in words is "eleven billion, one hundred seventy-two million, two hundred seven thousand, two hundred eleven".