31123332001212 has 192 divisors, whose sum is σ = 83128741183488. Its totient is φ = 8977547520000.

The previous prime is 31123332001129. The next prime is 31123332001249. The reversal of 31123332001212 is 21210023332113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64458087 + ... + 64939137.

It is an arithmetic number, because the mean of its divisors is an integer number (432962193664).

Almost surely, 2^{31123332001212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31123332001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41564370591744).

31123332001212 is an abundant number, since it is smaller than the sum of its proper divisors (52005409182276).

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

31123332001212 is a wasteful number, since it uses less digits than its factorization.

31123332001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481360 (or 481358 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31123332001212 its reverse (21210023332113), we get a palindrome (52333355333325).

The spelling of 31123332001212 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred thirty-two million, one thousand, two hundred twelve".