1544222444121 has 24 divisors (see below), whose sum is σ = 2618089707584. Its totient is φ = 858563828640.

The previous prime is 1544222444059. The next prime is 1544222444123. The reversal of 1544222444121 is 1214442224451.

1544222444121 is a `hidden beast` number, since 1 + 54 + 42 + 2 + 2 + 444 + 121 = 666.

It is not a de Polignac number, because 1544222444121 - 2¹¹ = 1544222442073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1544222444123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331233715 + ... + 331238376.

Almost surely, 2^{1544222444121} is an apocalyptic number.

It is an amenable number.

1544222444121 is a deficient number, since it is larger than the sum of its proper divisors (1073867263463).

1544222444121 is a wasteful number, since it uses less digits than its factorization.

1544222444121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662472141 (or 662472138 counting only the distinct ones).

The product of its digits is 81920, while the sum is 36.

Adding to 1544222444121 its reverse (1214442224451), we get a palindrome (2758664668572).

The spelling of 1544222444121 in words is "one trillion, five hundred forty-four billion, two hundred twenty-two million, four hundred forty-four thousand, one hundred twenty-one".