21212075404743 has 8 divisors (see below), whose sum is σ = 28313542800000. Its totient is φ = 14125995806328.

The previous prime is 21212075404739. The next prime is 21212075404777. The reversal of 21212075404743 is 34740457021212.

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

It is not a de Polignac number, because 21212075404743 - 2² = 21212075404739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21212075404695 and 21212075404704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212075404343) 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, 3846945993 + ... + 3846951506.

It is an arithmetic number, because the mean of its divisors is an integer number (3539192850000).

Almost surely, 2^{21212075404743} is an apocalyptic number.

21212075404743 is a deficient number, since it is larger than the sum of its proper divisors (7101467395257).

21212075404743 is an equidigital number, since it uses as much as digits as its factorization.

21212075404743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693898421.

The product of its (nonzero) digits is 376320, while the sum is 42.

The spelling of 21212075404743 in words is "twenty-one trillion, two hundred twelve billion, seventy-five million, four hundred four thousand, seven hundred forty-three".