21213545103989 has 8 divisors (see below), whose sum is σ = 24244081519680. Its totient is φ = 18183016181376.

The previous prime is 21213545103953. The next prime is 21213545103991. The reversal of 21213545103989 is 98930154531212.

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

It is a cyclic number.

It is not a de Polignac number, because 21213545103989 - 2²⁴ = 21213528326773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21213545103989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213545100989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6987557 + ... + 9552645.

It is an arithmetic number, because the mean of its divisors is an integer number (3030510189960).

Almost surely, 2^{21213545103989} is an apocalyptic number.

It is an amenable number.

21213545103989 is a deficient number, since it is larger than the sum of its proper divisors (3030536415691).

21213545103989 is a wasteful number, since it uses less digits than its factorization.

21213545103989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746539.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 21213545103989 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-five million, one hundred three thousand, nine hundred eighty-nine".