1216039822 has 4 divisors (see below), whose sum is σ = 1824059736. Its totient is φ = 608019910.

The previous prime is 1216039807. The next prime is 1216039823. The reversal of 1216039822 is 2289306121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2289306121 = 15643 ⋅146347.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216039823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304009954 + ... + 304009957.

It is an arithmetic number, because the mean of its divisors is an integer number (456014934).

Almost surely, 2^1216039822 is an apocalyptic number.

1216039822 is a deficient number, since it is larger than the sum of its proper divisors (608019914).

1216039822 is an equidigital number, since it uses as much as digits as its factorization.

1216039822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608019913.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1216039822 is about 34871.7625307354. The cubic root of 1216039822 is about 1067.3723107969.

The spelling of 1216039822 in words is "one billion, two hundred sixteen million, thirty-nine thousand, eight hundred twenty-two".