31203032200000 has 168 divisors, whose sum is σ = 77623013856024. Its totient is φ = 12444149760000.

The previous prime is 31203032199943. The next prime is 31203032200007. The reversal of 31203032200000 is 223030213.

It can be written as a sum of positive squares in 12 ways, for example, as 29836153213504 + 1366878986496 = 5462248^2 + 1169136^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203032200007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67168524 + ... + 67631476.

It is an arithmetic number, because the mean of its divisors is an integer number (462041749143).

Almost surely, 2^{31203032200000} 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 31203032200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38811506928012).

31203032200000 is an abundant number, since it is smaller than the sum of its proper divisors (46419981656024).

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

31203032200000 is an frugal number, since it uses more digits than its factorization.

31203032200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463327 (or 463297 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 31203032200000 its reverse (223030213), we get a palindrome (31203255230213).

The spelling of 31203032200000 in words is "thirty-one trillion, two hundred three billion, thirty-two million, two hundred thousand".