31102120200 has 192 divisors, whose sum is σ = 99688619520. Its totient is φ = 8013312000.

The previous prime is 31102120199. The next prime is 31102120207. The reversal of 31102120200 is 202120113.

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

It is not an unprimeable number, because it can be changed into a prime (31102120207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17501712 + ... + 17503488.

It is an arithmetic number, because the mean of its divisors is an integer number (519211560).

Almost surely, 2^31102120200 is an apocalyptic number.

31102120200 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 31102120200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49844309760).

31102120200 is an abundant number, since it is smaller than the sum of its proper divisors (68586499320).

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

31102120200 is a wasteful number, since it uses less digits than its factorization.

31102120200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 31102120200 its reverse (202120113), we get a palindrome (31304240313).

The spelling of 31102120200 in words is "thirty-one billion, one hundred two million, one hundred twenty thousand, two hundred".