31230211200000 has 264 divisors, whose sum is σ = 104043246368544. Its totient is φ = 8328053760000.

The previous prime is 31230211199987. The next prime is 31230211200073. The reversal of 31230211200000 is 211203213.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7973427 + ... + 11226573.

Almost surely, 2^{31230211200000} is an apocalyptic number.

31230211200000 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 31230211200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52021623184272).

31230211200000 is an abundant number, since it is smaller than the sum of its proper divisors (72813035168544).

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

31230211200000 is an frugal number, since it uses more digits than its factorization.

31230211200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253195 (or 3253157 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31230211200000 its reverse (211203213), we get a palindrome (31230422403213).

The spelling of 31230211200000 in words is "thirty-one trillion, two hundred thirty billion, two hundred eleven million, two hundred thousand".