305344012003021 has 16 divisors (see below), whose sum is σ = 319823659077120. Its totient is φ = 290966684248240.

The previous prime is 305344012003003. The next prime is 305344012003031. The reversal of 305344012003021 is 120300210443503.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 305344012003021 - 2¹⁹ = 305344011478733 is a prime.

It is a super-2 number, since 2×305344012003021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305344012003031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16022935 + ... + 29452036.

It is an arithmetic number, because the mean of its divisors is an integer number (19988978692320).

Almost surely, 2^{305344012003021} is an apocalyptic number.

It is an amenable number.

305344012003021 is a deficient number, since it is larger than the sum of its proper divisors (14479647074099).

305344012003021 is a wasteful number, since it uses less digits than its factorization.

305344012003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45476096.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 305344012003021 its reverse (120300210443503), we get a palindrome (425644222446524).

The spelling of 305344012003021 in words is "three hundred five trillion, three hundred forty-four billion, twelve million, three thousand, twenty-one".