21002123096628 has 48 divisors (see below), whose sum is σ = 52084889619840. Its totient is φ = 6563848489984.

The previous prime is 21002123096621. The next prime is 21002123096641. The reversal of 21002123096628 is 82669032120012.

It is a self number, because there is not a number n which added to its sum of digits gives 21002123096628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002123096621) 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, 195671793 + ... + 195779096.

It is an arithmetic number, because the mean of its divisors is an integer number (1085101867080).

Almost surely, 2^{21002123096628} is an apocalyptic number.

It is an amenable number.

21002123096628 is an abundant number, since it is smaller than the sum of its proper divisors (31082766523212).

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

21002123096628 is a wasteful number, since it uses less digits than its factorization.

21002123096628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391451176 (or 391451174 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 21002123096628 in words is "twenty-one trillion, two billion, one hundred twenty-three million, ninety-six thousand, six hundred twenty-eight".