1212222231 has 48 divisors (see below), whose sum is σ = 1972838400. Its totient is φ = 710804160.

The previous prime is 1212222227. The next prime is 1212222251. The reversal of 1212222231 is 1322222121.

1212222231 is a `hidden beast` number, since 1 + 212 + 222 + 231 = 666.

It is not a de Polignac number, because 1212222231 - 2² = 1212222227 is a prime.

It is a super-2 number, since 2×1212222231² = 2938965474661234722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212222251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 728106 + ... + 729768.

It is an arithmetic number, because the mean of its divisors is an integer number (41100800).

Almost surely, 2^1212222231 is an apocalyptic number.

1212222231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212222231 is a deficient number, since it is larger than the sum of its proper divisors (760616169).

1212222231 is a wasteful number, since it uses less digits than its factorization.

1212222231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916 (or 1913 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1212222231 is about 34816.9819341080. The cubic root of 1212222231 is about 1066.2541833614.

Adding to 1212222231 its reverse (1322222121), we get a palindrome (2534444352).

The spelling of 1212222231 in words is "one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred thirty-one".