11211205670 has 64 divisors (see below), whose sum is σ = 23350394880. Its totient is φ = 3796232832.

The previous prime is 11211205669. The next prime is 11211205693. The reversal of 11211205670 is 7650211211.

11211205670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11211205670² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2033057 + ... + 2038563.

It is an arithmetic number, because the mean of its divisors is an integer number (364849920).

Almost surely, 2^11211205670 is an apocalyptic number.

11211205670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11211205670 is an abundant number, since it is smaller than the sum of its proper divisors (12139189210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11211205670 is a wasteful number, since it uses less digits than its factorization.

11211205670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5877.

The product of its (nonzero) digits is 840, while the sum is 26.

Adding to 11211205670 its reverse (7650211211), we get a palindrome (18861416881).

The spelling of 11211205670 in words is "eleven billion, two hundred eleven million, two hundred five thousand, six hundred seventy".