11111211320 has 32 divisors (see below), whose sum is σ = 27272974320. Its totient is φ = 4040440320.

The previous prime is 11111211283. The next prime is 11111211337. The reversal of 11111211320 is 2311211111.

It is a super-2 number, since 2×11111211320² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111211295 and 11111211304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12625937 + ... + 12626816.

Almost surely, 2^11111211320 is an apocalyptic number.

11111211320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111211320 is an abundant number, since it is smaller than the sum of its proper divisors (16161763000).

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

11111211320 is a wasteful number, since it uses less digits than its factorization.

11111211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25252775 (or 25252771 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11111211320 its reverse (2311211111), we get a palindrome (13422422431).

The spelling of 11111211320 in words is "eleven billion, one hundred eleven million, two hundred eleven thousand, three hundred twenty".