31220023110012 has 288 divisors, whose sum is σ = 88475323023360. Its totient is φ = 9202260493440.

The previous prime is 31220023110011. The next prime is 31220023110041. The reversal of 31220023110012 is 21001132002213.

31220023110012 is a `hidden beast` number, since 312 + 20 + 0 + 231 + 100 + 1 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220023110011) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2207447013 + ... + 2207461155.

It is an arithmetic number, because the mean of its divisors is an integer number (307205982720).

Almost surely, 2^{31220023110012} 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 31220023110012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44237661511680).

31220023110012 is an abundant number, since it is smaller than the sum of its proper divisors (57255299913348).

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

31220023110012 is a wasteful number, since it uses less digits than its factorization.

31220023110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15213 (or 15208 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31220023110012 its reverse (21001132002213), we get a palindrome (52221155112225).

The spelling of 31220023110012 in words is "thirty-one trillion, two hundred twenty billion, twenty-three million, one hundred ten thousand, twelve".