31211031221101 has 8 divisors (see below), whose sum is σ = 31365076548960. Its totient is φ = 31057309179792.

The previous prime is 31211031221093. The next prime is 31211031221107. The reversal of 31211031221101 is 10112213011213.

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 31211031221101 - 2³ = 31211031221093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211031221107) 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, 80628075 + ... + 81014248.

It is an arithmetic number, because the mean of its divisors is an integer number (3920634568620).

Almost surely, 2^{31211031221101} is an apocalyptic number.

It is an amenable number.

31211031221101 is a deficient number, since it is larger than the sum of its proper divisors (154045327859).

31211031221101 is a wasteful number, since it uses less digits than its factorization.

31211031221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161643275.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31211031221101 its reverse (10112213011213), we get a palindrome (41323244232314).

The spelling of 31211031221101 in words is "thirty-one trillion, two hundred eleven billion, thirty-one million, two hundred twenty-one thousand, one hundred one".