102444456021 has 16 divisors (see below), whose sum is σ = 141828019200. Its totient is φ = 65696109248.

The previous prime is 102444456011. The next prime is 102444456131. The reversal of 102444456021 is 120654444201.

It is a cyclic number.

It is not a de Polignac number, because 102444456021 - 2¹⁸ = 102444193877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102444456011) 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, 2165301 + ... + 2212106.

It is an arithmetic number, because the mean of its divisors is an integer number (8864251200).

Almost surely, 2^102444456021 is an apocalyptic number.

It is an amenable number.

102444456021 is a deficient number, since it is larger than the sum of its proper divisors (39383563179).

102444456021 is a wasteful number, since it uses less digits than its factorization.

102444456021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4377708.

The product of its (nonzero) digits is 30720, while the sum is 33.

The spelling of 102444456021 in words is "one hundred two billion, four hundred forty-four million, four hundred fifty-six thousand, twenty-one".