21221933091342 has 8 divisors (see below), whose sum is σ = 42443866182696. Its totient is φ = 7073977697112.

The previous prime is 21221933091311. The next prime is 21221933091343. The reversal of 21221933091342 is 24319033912212.

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

21221933091342 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21221933091294 and 21221933091303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221933091343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1768494424273 + ... + 1768494424284.

It is an arithmetic number, because the mean of its divisors is an integer number (5305483272837).

Almost surely, 2^{21221933091342} is an apocalyptic number.

21221933091342 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.

21221933091342 is a wasteful number, since it uses less digits than its factorization.

21221933091342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536988848562.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 21221933091342 in words is "twenty-one trillion, two hundred twenty-one billion, nine hundred thirty-three million, ninety-one thousand, three hundred forty-two".