1222422140 has 12 divisors (see below), whose sum is σ = 2567086536. Its totient is φ = 488968848.

The previous prime is 1222422137. The next prime is 1222422199. The reversal of 1222422140 is 412242221.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 61121107 = 1222422140 / (1 + 2 + 2 + 2 + 4 + 2 + 2 + 1 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30560534 + ... + 30560573.

It is an arithmetic number, because the mean of its divisors is an integer number (213923878).

Almost surely, 2^1222422140 is an apocalyptic number.

1222422140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222422140 is an abundant number, since it is smaller than the sum of its proper divisors (1344664396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222422140 is a wasteful number, since it uses less digits than its factorization.

1222422140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61121116 (or 61121114 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1222422140 is about 34963.1540339255. The cubic root of 1222422140 is about 1069.2364016510.

Adding to 1222422140 its reverse (412242221), we get a palindrome (1634664361).

The spelling of 1222422140 in words is "one billion, two hundred twenty-two million, four hundred twenty-two thousand, one hundred forty".