31031203200001 has 4 divisors (see below), whose sum is σ = 31037765100100. Its totient is φ = 31024641299904.

The previous prime is 31031203199963. The next prime is 31031203200031. The reversal of 31031203200001 is 10000230213013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17102782073601 + 13928421126400 = 4135551^2 + 3732080^2 .

It is a cyclic number.

It is not a de Polignac number, because 31031203200001 - 2¹³ = 31031203191809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31031203200031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3280942956 + ... + 3280952413.

It is an arithmetic number, because the mean of its divisors is an integer number (7759441275025).

Almost surely, 2^{31031203200001} is an apocalyptic number.

It is an amenable number.

31031203200001 is a deficient number, since it is larger than the sum of its proper divisors (6561900099).

31031203200001 is an equidigital number, since it uses as much as digits as its factorization.

31031203200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6561900098.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31031203200001 its reverse (10000230213013), we get a palindrome (41031433413014).

The spelling of 31031203200001 in words is "thirty-one trillion, thirty-one billion, two hundred three million, two hundred thousand, one".