1220222143 has 8 divisors (see below), whose sum is σ = 1396295712. Its totient is φ = 1044587616.

The previous prime is 1220222119. The next prime is 1220222173. The reversal of 1220222143 is 3412220221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220222143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220222143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220222173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103780 + ... + 114937.

It is an arithmetic number, because the mean of its divisors is an integer number (174536964).

Almost surely, 2^1220222143 is an apocalyptic number.

1220222143 is a deficient number, since it is larger than the sum of its proper divisors (176073569).

1220222143 is an equidigital number, since it uses as much as digits as its factorization.

1220222143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219521.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1220222143 is about 34931.6782161980. The cubic root of 1220222143 is about 1068.5945804206.

Adding to 1220222143 its reverse (3412220221), we get a palindrome (4632442364).

The spelling of 1220222143 in words is "one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred forty-three".