31210212011112 has 48 divisors (see below), whose sum is σ = 84528615394080. Its totient is φ = 10403286112800.

The previous prime is 31210212011093. The next prime is 31210212011129. The reversal of 31210212011112 is 21111021201213.

It is a happy number.

It is a super-2 number, since 2×31210212011112² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4061037 + ... + 8883267.

It is an arithmetic number, because the mean of its divisors is an integer number (1761012820710).

Almost surely, 2^{31210212011112} is an apocalyptic number.

It is an amenable number.

31210212011112 is an abundant number, since it is smaller than the sum of its proper divisors (53318403382968).

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

31210212011112 is a wasteful number, since it uses less digits than its factorization.

31210212011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4912134 (or 4912127 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 31210212011112 its reverse (21111021201213), we get a palindrome (52321233212325).

The spelling of 31210212011112 in words is "thirty-one trillion, two hundred ten billion, two hundred twelve million, eleven thousand, one hundred twelve".