212212221220231 has 16 divisors (see below), whose sum is σ = 223692181672960. Its totient is φ = 200763359390880.

The previous prime is 212212221220169. The next prime is 212212221220253. The reversal of 212212221220231 is 132022122212212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212212221220231 is a prime.

It is a super-2 number, since 2×212212221220231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212212221220196 and 212212221220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212221226231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1532027266 + ... + 1532165776.

It is an arithmetic number, because the mean of its divisors is an integer number (13980761354560).

Almost surely, 2^{212212221220231} is an apocalyptic number.

212212221220231 is a deficient number, since it is larger than the sum of its proper divisors (11479960452729).

212212221220231 is a wasteful number, since it uses less digits than its factorization.

212212221220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250174.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 212212221220231 its reverse (132022122212212), we get a palindrome (344234343432443).

The spelling of 212212221220231 in words is "two hundred twelve trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, two hundred thirty-one".