1221143662 has 8 divisors (see below), whose sum is σ = 1836995256. Its totient is φ = 608811912.

The previous prime is 1221143659. The next prime is 1221143681. The reversal of 1221143662 is 2663411221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1221143662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879093 + ... + 880480.

It is an arithmetic number, because the mean of its divisors is an integer number (229624407).

Almost surely, 2^1221143662 is an apocalyptic number.

1221143662 is a deficient number, since it is larger than the sum of its proper divisors (615851594).

1221143662 is a wasteful number, since it uses less digits than its factorization.

1221143662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759922.

The product of its digits is 3456, while the sum is 28.

The square root of 1221143662 is about 34944.8660320797. The cubic root of 1221143662 is about 1068.8635157199.

Adding to 1221143662 its reverse (2663411221), we get a palindrome (3884554883).

The spelling of 1221143662 in words is "one billion, two hundred twenty-one million, one hundred forty-three thousand, six hundred sixty-two".