211231212213331 has 8 divisors (see below), whose sum is σ = 217939906623600. Its totient is φ = 204596647023360.

The previous prime is 211231212213311. The next prime is 211231212213337. The reversal of 211231212213331 is 133312212132112.

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 211231212213331 - 2¹⁷ = 211231212082259 is a prime.

It is a super-2 number, since 2×211231212213331² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211231212213331.

It is not an unprimeable number, because it can be changed into a prime (211231212213337) 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, 18532299286 + ... + 18532310683.

It is an arithmetic number, because the mean of its divisors is an integer number (27242488327950).

Almost surely, 2^{211231212213331} is an apocalyptic number.

211231212213331 is a deficient number, since it is larger than the sum of its proper divisors (6708694410269).

211231212213331 is a wasteful number, since it uses less digits than its factorization.

211231212213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37064610149.

The product of its digits is 2592, while the sum is 28.

Adding to 211231212213331 its reverse (133312212132112), we get a palindrome (344543424345443).

The spelling of 211231212213331 in words is "two hundred eleven trillion, two hundred thirty-one billion, two hundred twelve million, two hundred thirteen thousand, three hundred thirty-one".