31211161745122 has 8 divisors (see below), whose sum is σ = 47958614388972. Its totient is φ = 15224956948800.

The previous prime is 31211161745087. The next prime is 31211161745143. The reversal of 31211161745122 is 22154716111213.

It can be written as a sum of positive squares in 2 ways, for example, as 30822383307681 + 388778437441 = 5551791^2 + 623521^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190311961779 + ... + 190311961942.

Almost surely, 2^{31211161745122} is an apocalyptic number.

31211161745122 is a deficient number, since it is larger than the sum of its proper divisors (16747452643850).

31211161745122 is a wasteful number, since it uses less digits than its factorization.

31211161745122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380623923764.

The product of its digits is 20160, while the sum is 37.

Adding to 31211161745122 its reverse (22154716111213), we get a palindrome (53365877856335).

The spelling of 31211161745122 in words is "thirty-one trillion, two hundred eleven billion, one hundred sixty-one million, seven hundred forty-five thousand, one hundred twenty-two".