21102144103394 has 4 divisors (see below), whose sum is σ = 31653216155094. Its totient is φ = 10551072051696.

The previous prime is 21102144103367. The next prime is 21102144103409. The reversal of 21102144103394 is 49330144120112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19807065963169 + 1295078140225 = 4450513^2 + 1138015^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275536025847 + ... + 5275536025850.

Almost surely, 2^{21102144103394} is an apocalyptic number.

21102144103394 is a deficient number, since it is larger than the sum of its proper divisors (10551072051700).

21102144103394 is a wasteful number, since it uses less digits than its factorization.

21102144103394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551072051699.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 21102144103394 in words is "twenty-one trillion, one hundred two billion, one hundred forty-four million, one hundred three thousand, three hundred ninety-four".