1212212222231 has 2 divisors, whose sum is σ = 1212212222232. Its totient is φ = 1212212222230.

The previous prime is 1212212222191. The next prime is 1212212222269. The reversal of 1212212222231 is 1322222122121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212212222231 is a prime.

It is a super-2 number, since 2×1212212222231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212212222197 and 1212212222206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212212222281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606106111115 + 606106111116.

It is an arithmetic number, because the mean of its divisors is an integer number (606106111116).

Almost surely, 2^{1212212222231} is an apocalyptic number.

1212212222231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212212222231 is an equidigital number, since it uses as much as digits as its factorization.

1212212222231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

Adding to 1212212222231 its reverse (1322222122121), we get a palindrome (2534434344352).

The spelling of 1212212222231 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, two hundred thirty-one".