21305211653102 has 8 divisors (see below), whose sum is σ = 34416111131976. Its totient is φ = 9833174609112.

The previous prime is 21305211653027. The next prime is 21305211653111. The reversal of 21305211653102 is 20135611250312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409715608688 + ... + 409715608739.

It is an arithmetic number, because the mean of its divisors is an integer number (4302013891497).

Almost surely, 2^{21305211653102} is an apocalyptic number.

21305211653102 is a deficient number, since it is larger than the sum of its proper divisors (13110899478874).

21305211653102 is a wasteful number, since it uses less digits than its factorization.

21305211653102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819431217442.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 21305211653102 in words is "twenty-one trillion, three hundred five billion, two hundred eleven million, six hundred fifty-three thousand, one hundred two".