1242221134 has 32 divisors (see below), whose sum is σ = 2329689600. Its totient is φ = 482612640.

The previous prime is 1242221111. The next prime is 1242221153. The reversal of 1242221134 is 4311222421.

It is a super-2 number, since 2×1242221134² = 3086226691512491912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44052 + ... + 66520.

It is an arithmetic number, because the mean of its divisors is an integer number (72802800).

Almost surely, 2^1242221134 is an apocalyptic number.

1242221134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1242221134 is a deficient number, since it is larger than the sum of its proper divisors (1087468466).

1242221134 is a wasteful number, since it uses less digits than its factorization.

1242221134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22848.

The product of its digits is 768, while the sum is 22.

The square root of 1242221134 is about 35245.1575964699. The cubic root of 1242221134 is about 1074.9781525035.

Adding to 1242221134 its reverse (4311222421), we get a palindrome (5553443555).

The spelling of 1242221134 in words is "one billion, two hundred forty-two million, two hundred twenty-one thousand, one hundred thirty-four".