21396202111902 has 8 divisors (see below), whose sum is σ = 42792404223816. Its totient is φ = 7132067370632.

The previous prime is 21396202111819. The next prime is 21396202111909. The reversal of 21396202111902 is 20911120269312.

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

21396202111902 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21396202111909) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1783016842653 + ... + 1783016842664.

It is an arithmetic number, because the mean of its divisors is an integer number (5349050527977).

Almost surely, 2^{21396202111902} is an apocalyptic number.

21396202111902 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21396202111902 is a wasteful number, since it uses less digits than its factorization.

21396202111902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3566033685322.

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 21396202111902 in words is "twenty-one trillion, three hundred ninety-six billion, two hundred two million, one hundred eleven thousand, nine hundred two".