1216284922 has 4 divisors (see below), whose sum is σ = 1824427386. Its totient is φ = 608142460.

The previous prime is 1216284913. The next prime is 1216284959. The reversal of 1216284922 is 2294826121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1206242361 + 10042561 = 34731^2 + 3169^2 .

It is a super-2 number, since 2×1216284922² = 2958698022969092168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304071229 + ... + 304071232.

Almost surely, 2^1216284922 is an apocalyptic number.

1216284922 is a deficient number, since it is larger than the sum of its proper divisors (608142464).

1216284922 is an equidigital number, since it uses as much as digits as its factorization.

1216284922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608142463.

The product of its digits is 27648, while the sum is 37.

The square root of 1216284922 is about 34875.2766584009. The cubic root of 1216284922 is about 1067.4440177082. Note that the first 3 decimals are identical.

The spelling of 1216284922 in words is "one billion, two hundred sixteen million, two hundred eighty-four thousand, nine hundred twenty-two".