1221004344132 has 48 divisors (see below), whose sum is σ = 3166808444800. Its totient is φ = 406841810400.

The previous prime is 1221004344113. The next prime is 1221004344139. The reversal of 1221004344132 is 2314434001221.

1221004344132 is a `hidden beast` number, since 1 + 2 + 210 + 0 + 4 + 3 + 441 + 3 + 2 = 666.

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 = 1221004344096 and 1221004344105.

It is not an unprimeable number, because it can be changed into a prime (1221004344139) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1940407 + ... + 2491422.

Almost surely, 2^{1221004344132} is an apocalyptic number.

1221004344132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221004344132 is an abundant number, since it is smaller than the sum of its proper divisors (1945804100668).

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

1221004344132 is a wasteful number, since it uses less digits than its factorization.

1221004344132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434393 (or 4434385 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1221004344132 its reverse (2314434001221), we get a palindrome (3535438345353).

The spelling of 1221004344132 in words is "one trillion, two hundred twenty-one billion, four million, three hundred forty-four thousand, one hundred thirty-two".