31212201212200 has 24 divisors (see below), whose sum is σ = 72568367818830. Its totient is φ = 12484880484800.

The previous prime is 31212201212083. The next prime is 31212201212251. The reversal of 31212201212200 is 221210221213.

It can be written as a sum of positive squares in 3 ways, for example, as 28593895350276 + 2618305861924 = 5347326^2 + 1618118^2 .

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 5 ways as a sum of consecutive naturals, for example, 78030502831 + ... + 78030503230.

Almost surely, 2^{31212201212200} is an apocalyptic number.

It is an amenable number.

31212201212200 is an abundant number, since it is smaller than the sum of its proper divisors (41356166606630).

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

31212201212200 is a wasteful number, since it uses less digits than its factorization.

31212201212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156061006077 (or 156061006068 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31212201212200 its reverse (221210221213), we get a palindrome (31433411433413).

The spelling of 31212201212200 in words is "thirty-one trillion, two hundred twelve billion, two hundred one million, two hundred twelve thousand, two hundred".