1121521221416 has 32 divisors (see below), whose sum is σ = 2105029355400. Its totient is φ = 560180248320.

The previous prime is 1121521221361. The next prime is 1121521221449. The reversal of 1121521221416 is 6141221251211.

It can be written as a sum of positive squares in 4 ways, for example, as 1076427000100 + 45094221316 = 1037510^2 + 212354^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81897866 + ... + 81911558.

Almost surely, 2^{1121521221416} is an apocalyptic number.

It is an amenable number.

1121521221416 is a deficient number, since it is larger than the sum of its proper divisors (983508133984).

1121521221416 is a wasteful number, since it uses less digits than its factorization.

1121521221416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23549 (or 23545 counting only the distinct ones).

The product of its digits is 1920, while the sum is 29.

Adding to 1121521221416 its reverse (6141221251211), we get a palindrome (7262742472627).

The spelling of 1121521221416 in words is "one trillion, one hundred twenty-one billion, five hundred twenty-one million, two hundred twenty-one thousand, four hundred sixteen".