12301931922921 has 9 divisors (see below), whose sum is σ = 17769472420791. Its totient is φ = 8201280933792.

The previous prime is 12301931922877. The next prime is 12301931922923. The reversal of 12301931922921 is 12922913910321.

The square root of 12301931922921 is 3507411.

It is a perfect power (a square), and thus also a powerful number.

12301931922921 is a `hidden beast` number, since 1 + 2 + 30 + 19 + 319 + 2 + 292 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12277700642025 + 24231280896 = 3503955^2 + 155664^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 12301931922921 - 2³¹ = 12299784439273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12301931922923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9937665 + ... + 11106801.

Almost surely, 2^{12301931922921} is an apocalyptic number.

12301931922921 is the 3507411-st square number.

12301931922921 is the 1753706-th centered octagonal number.

It is an amenable number.

12301931922921 is a deficient number, since it is larger than the sum of its proper divisors (5467540497870).

12301931922921 is an frugal number, since it uses more digits than its factorization.

12301931922921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338280 (or 1169140 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 12301931922921 in words is "twelve trillion, three hundred one billion, nine hundred thirty-one million, nine hundred twenty-two thousand, nine hundred twenty-one".