21144968102 has 16 divisors (see below), whose sum is σ = 33473986560. Its totient is φ = 9989879112.

The previous prime is 21144968069. The next prime is 21144968107. The reversal of 21144968102 is 20186944112.

21144968102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144968107) 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 7 ways as a sum of consecutive naturals, for example, 711878 + ... + 740985.

It is an arithmetic number, because the mean of its divisors is an integer number (2092124160).

Almost surely, 2^21144968102 is an apocalyptic number.

21144968102 is a deficient number, since it is larger than the sum of its proper divisors (12329018458).

21144968102 is a wasteful number, since it uses less digits than its factorization.

21144968102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453267.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 21144968102 in words is "twenty-one billion, one hundred forty-four million, nine hundred sixty-eight thousand, one hundred two".