1115142013221 has 16 divisors (see below), whose sum is σ = 1574628346368. Its totient is φ = 699559078400.

The previous prime is 1115142013207. The next prime is 1115142013277. The reversal of 1115142013221 is 1223102415111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1115142013221 - 2⁵ = 1115142013189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1115142013191 and 1115142013200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115142013421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1892565 + ... + 2410826.

It is an arithmetic number, because the mean of its divisors is an integer number (98414271648).

Almost surely, 2^{1115142013221} is an apocalyptic number.

It is an amenable number.

1115142013221 is a deficient number, since it is larger than the sum of its proper divisors (459486333147).

1115142013221 is a wasteful number, since it uses less digits than its factorization.

1115142013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308492.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 1115142013221 its reverse (1223102415111), we get a palindrome (2338244428332).

The spelling of 1115142013221 in words is "one trillion, one hundred fifteen billion, one hundred forty-two million, thirteen thousand, two hundred twenty-one".