31111211211112 has 16 divisors (see below), whose sum is σ = 58333582658340. Its totient is φ = 15555589168896.

The previous prime is 31111211211107. The next prime is 31111211211131. The reversal of 31111211211112 is 21111211211113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30951797872356 + 159413338756 = 5563434^2 + 399266^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31111211211112.

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, 10508698 + ... + 13139830.

Almost surely, 2^{31111211211112} is an apocalyptic number.

It is an amenable number.

31111211211112 is a deficient number, since it is larger than the sum of its proper divisors (27222371447228).

31111211211112 is a wasteful number, since it uses less digits than its factorization.

31111211211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109172 (or 4109168 counting only the distinct ones).

The product of its digits is 24, while the sum is 19.

Adding to 31111211211112 its reverse (21111211211113), we get a palindrome (52222422422225).

Subtracting from 31111211211112 its reverse (21111211211113), we obtain a palindrome (9999999999999).

The spelling of 31111211211112 in words is "thirty-one trillion, one hundred eleven billion, two hundred eleven million, two hundred eleven thousand, one hundred twelve".