1222242140 has 48 divisors (see below), whose sum is σ = 2977185792. Its totient is φ = 412796736.

The previous prime is 1222242121. The next prime is 1222242143. The reversal of 1222242140 is 412422221.

It is a super-3 number, since 3×1222242140³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222242143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55772 + ... + 74531.

It is an arithmetic number, because the mean of its divisors is an integer number (62024704).

Almost surely, 2^1222242140 is an apocalyptic number.

1222242140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222242140 is an abundant number, since it is smaller than the sum of its proper divisors (1754943652).

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

1222242140 is a wasteful number, since it uses less digits than its factorization.

1222242140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130386 (or 130384 counting only the distinct ones).

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

The square root of 1222242140 is about 34960.5798006841. The cubic root of 1222242140 is about 1069.1839178722.

Adding to 1222242140 its reverse (412422221), we get a palindrome (1634664361).

The spelling of 1222242140 in words is "one billion, two hundred twenty-two million, two hundred forty-two thousand, one hundred forty".