31203003222113 has 4 divisors (see below), whose sum is σ = 31203132365460. Its totient is φ = 31202874078768.

The previous prime is 31203003222037. The next prime is 31203003222143. The reversal of 31203003222113 is 31122230030213.

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 22653858794449 + 8549144427664 = 4759607^2 + 2923892^2 .

It is a cyclic number.

It is not a de Polignac number, because 31203003222113 - 2¹⁸ = 31203002959969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31203003222143) 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, 64208570 + ... + 64692707.

It is an arithmetic number, because the mean of its divisors is an integer number (7800783091365).

Almost surely, 2^{31203003222113} is an apocalyptic number.

It is an amenable number.

31203003222113 is a deficient number, since it is larger than the sum of its proper divisors (129143347).

31203003222113 is a wasteful number, since it uses less digits than its factorization.

31203003222113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129143346.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31203003222113 its reverse (31122230030213), we get a palindrome (62325233252326).

The spelling of 31203003222113 in words is "thirty-one trillion, two hundred three billion, three million, two hundred twenty-two thousand, one hundred thirteen".