11111311012 has 12 divisors (see below), whose sum is σ = 19445897520. Its totient is φ = 5555340296.

The previous prime is 11111311009. The next prime is 11111311039. The reversal of 11111311012 is 21011311111.

It is a super-2 number, since 2×11111311012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111310983 and 11111311001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12183 + ... + 149569.

It is an arithmetic number, because the mean of its divisors is an integer number (1620491460).

Almost surely, 2^11111311012 is an apocalyptic number.

It is an amenable number.

11111311012 is a deficient number, since it is larger than the sum of its proper divisors (8334586508).

11111311012 is a wasteful number, since it uses less digits than its factorization.

11111311012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157610 (or 157608 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11111311012 its reverse (21011311111), we get a palindrome (32122622123).

Subtracting 11111311012 from its reverse (21011311111), we obtain a palindrome (9900000099).

The spelling of 11111311012 in words is "eleven billion, one hundred eleven million, three hundred eleven thousand, twelve".