31212100012112 has 40 divisors (see below), whose sum is σ = 60774032088000. Its totient is φ = 15528584747520.

The previous prime is 31212100012057. The next prime is 31212100012117. The reversal of 31212100012112 is 21121000121213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212100012117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1406639 + ... + 8025137.

It is an arithmetic number, because the mean of its divisors is an integer number (1519350802200).

Almost surely, 2^{31212100012112} is an apocalyptic number.

It is an amenable number.

31212100012112 is a deficient number, since it is larger than the sum of its proper divisors (29561932075888).

31212100012112 is a wasteful number, since it uses less digits than its factorization.

31212100012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6619971 (or 6619965 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 31212100012112 its reverse (21121000121213), we get a palindrome (52333100133325).

The spelling of 31212100012112 in words is "thirty-one trillion, two hundred twelve billion, one hundred million, twelve thousand, one hundred twelve".