1121521221415 has 16 divisors (see below), whose sum is σ = 1538147426112. Its totient is φ = 769012533504.

The previous prime is 1121521221361. The next prime is 1121521221449. The reversal of 1121521221415 is 5141221251211.

It is a cyclic number.

It is not a de Polignac number, because 1121521221415 - 2¹³ = 1121521213223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273537 + ... + 1522453.

It is an arithmetic number, because the mean of its divisors is an integer number (96134214132).

Almost surely, 2^{1121521221415} is an apocalyptic number.

1121521221415 is a deficient number, since it is larger than the sum of its proper divisors (416626204697).

1121521221415 is a wasteful number, since it uses less digits than its factorization.

1121521221415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274586.

The product of its digits is 1600, while the sum is 28.

Adding to 1121521221415 its reverse (5141221251211), we get a palindrome (6262742472626).

The spelling of 1121521221415 in words is "one trillion, one hundred twenty-one billion, five hundred twenty-one million, two hundred twenty-one thousand, four hundred fifteen".