1221432104133 has 20 divisors (see below), whose sum is σ = 1827815214060. Its totient is φ = 812856952512.

The previous prime is 1221432104131. The next prime is 1221432104143. The reversal of 1221432104133 is 3314012341221.

1221432104133 is a `hidden beast` number, since 1 + 2 + 214 + 32 + 1 + 0 + 413 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 774007569729 + 447424534404 = 879777^2 + 668898^2 .

It is not a de Polignac number, because 1221432104133 - 2¹ = 1221432104131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1221432104097 and 1221432104106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221432104131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13204710 + ... + 13296887.

It is an arithmetic number, because the mean of its divisors is an integer number (91390760703).

Almost surely, 2^{1221432104133} is an apocalyptic number.

It is an amenable number.

1221432104133 is a deficient number, since it is larger than the sum of its proper divisors (606383109927).

1221432104133 is an equidigital number, since it uses as much as digits as its factorization.

1221432104133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26502178 (or 26502169 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 1221432104133 its reverse (3314012341221), we get a palindrome (4535444445354).

The spelling of 1221432104133 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-two million, one hundred four thousand, one hundred thirty-three".