31213021101211 has 8 divisors (see below), whose sum is σ = 31355757388800. Its totient is φ = 31070556435240.

The previous prime is 31213021101203. The next prime is 31213021101247. The reversal of 31213021101211 is 11210112031213.

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 31213021101211 - 2³ = 31213021101203 is a prime.

It is a super-5 number, since 5×31213021101211⁵ (a number of 69 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213021101511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67675051 + ... + 68134708.

It is an arithmetic number, because the mean of its divisors is an integer number (3919469673600).

Almost surely, 2^{31213021101211} is an apocalyptic number.

31213021101211 is a deficient number, since it is larger than the sum of its proper divisors (142736287589).

31213021101211 is a wasteful number, since it uses less digits than its factorization.

31213021101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135810809.

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

Adding to 31213021101211 its reverse (11210112031213), we get a palindrome (42423133132424).

The spelling of 31213021101211 in words is "thirty-one trillion, two hundred thirteen billion, twenty-one million, one hundred one thousand, two hundred eleven".