31030012200 has 192 divisors, whose sum is σ = 105036134400. Its totient is φ = 7515385600.

The previous prime is 31030012187. The next prime is 31030012217. The reversal of 31030012200 is 221003013.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12030511 + ... + 12033089.

It is an arithmetic number, because the mean of its divisors is an integer number (547063200).

Almost surely, 2^31030012200 is an apocalyptic number.

31030012200 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31030012200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52518067200).

31030012200 is an abundant number, since it is smaller than the sum of its proper divisors (74006122200).

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

31030012200 is a wasteful number, since it uses less digits than its factorization.

31030012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4432 (or 4423 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31030012200 its reverse (221003013), we get a palindrome (31251015213).

The spelling of 31030012200 in words is "thirty-one billion, thirty million, twelve thousand, two hundred".