1221041143044 has 18 divisors (see below), whose sum is σ = 3086520667230. Its totient is φ = 407013714336.

The previous prime is 1221041142983. The next prime is 1221041143103. The reversal of 1221041143044 is 4403411401221.

1221041143044 is a `hidden beast` number, since 1 + 2 + 210 + 4 + 11 + 430 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1186221583044 + 34819560000 = 1089138^2 + 186600^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 1221041142999 and 1221041143017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16958904729 + ... + 16958904800.

Almost surely, 2^{1221041143044} is an apocalyptic number.

It is an amenable number.

1221041143044 is an abundant number, since it is smaller than the sum of its proper divisors (1865479524186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221041143044 is a wasteful number, since it uses less digits than its factorization.

1221041143044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33917809539 (or 33917809534 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 1221041143044 its reverse (4403411401221), we get a palindrome (5624452544265).

The spelling of 1221041143044 in words is "one trillion, two hundred twenty-one billion, forty-one million, one hundred forty-three thousand, forty-four".