1242222111 has 48 divisors (see below), whose sum is σ = 2081544192. Its totient is φ = 707572800.

The previous prime is 1242222083. The next prime is 1242222139. The reversal of 1242222111 is 1112222421.

1242222111 is a `hidden beast` number, since 12 + 422 + 221 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (1242222083) and next prime (1242222139).

It is not a de Polignac number, because 1242222111 - 2⁹ = 1242221599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242221111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75976 + ... + 90866.

It is an arithmetic number, because the mean of its divisors is an integer number (43365504).

Almost surely, 2^1242222111 is an apocalyptic number.

1242222111 is a deficient number, since it is larger than the sum of its proper divisors (839322081).

1242222111 is a wasteful number, since it uses less digits than its factorization.

1242222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14964 (or 14961 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 1242222111 is about 35245.1714565272. The cubic root of 1242222111 is about 1074.9784343249.

Adding to 1242222111 its reverse (1112222421), we get a palindrome (2354444532).

The spelling of 1242222111 in words is "one billion, two hundred forty-two million, two hundred twenty-two thousand, one hundred eleven".