31211310000121 has 8 divisors (see below), whose sum is σ = 31685176343520. Its totient is φ = 30737679712608.

The previous prime is 31211310000109. The next prime is 31211310000139. The reversal of 31211310000121 is 12100001311213.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31211310000121 - 2⁹ = 31211309999609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31211310000095 and 31211310000104.

It is not an unprimeable number, because it can be changed into a prime (31211310000421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58747516 + ... + 59276413.

It is an arithmetic number, because the mean of its divisors is an integer number (3960647042940).

Almost surely, 2^{31211310000121} is an apocalyptic number.

It is an amenable number.

31211310000121 is a deficient number, since it is larger than the sum of its proper divisors (473866343399).

31211310000121 is a wasteful number, since it uses less digits than its factorization.

31211310000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118027943.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31211310000121 its reverse (12100001311213), we get a palindrome (43311311311334).

The spelling of 31211310000121 in words is "thirty-one trillion, two hundred eleven billion, three hundred ten million, one hundred twenty-one", and thus it is an aban number.