1004212355621 has 4 divisors (see below), whose sum is σ = 1004362716000. Its totient is φ = 1004061995244.

The previous prime is 1004212355599. The next prime is 1004212355683. The reversal of 1004212355621 is 1265532124001.

1004212355621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1004212355621 - 2¹⁸ = 1004212093477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004215355621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75170171 + ... + 75183528.

It is an arithmetic number, because the mean of its divisors is an integer number (251090679000).

Almost surely, 2^{1004212355621} is an apocalyptic number.

It is an amenable number.

1004212355621 is a deficient number, since it is larger than the sum of its proper divisors (150360379).

1004212355621 is an equidigital number, since it uses as much as digits as its factorization.

1004212355621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150360378.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 1004212355621 its reverse (1265532124001), we get a palindrome (2269744479622).

The spelling of 1004212355621 in words is "one trillion, four billion, two hundred twelve million, three hundred fifty-five thousand, six hundred twenty-one".