31101213000 has 256 divisors, whose sum is σ = 114001655040. Its totient is φ = 6959616000.

The previous prime is 31101212971. The next prime is 31101213037. The reversal of 31101213000 is 31210113.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 392752 + ... + 465248.

It is an arithmetic number, because the mean of its divisors is an integer number (445318965).

Almost surely, 2^31101213000 is an apocalyptic number.

31101213000 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 31101213000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57000827520).

31101213000 is an abundant number, since it is smaller than the sum of its proper divisors (82900442040).

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

31101213000 is a wasteful number, since it uses less digits than its factorization.

31101213000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72545 (or 72531 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 31101213000 its reverse (31210113), we get a palindrome (31132423113).

The spelling of 31101213000 in words is "thirty-one billion, one hundred one million, two hundred thirteen thousand".