21352122041442 has 16 divisors (see below), whose sum is σ = 44951835876960. Its totient is φ = 6742775381472.

The previous prime is 21352122041429. The next prime is 21352122041447. The reversal of 21352122041442 is 24414022125312.

It is not an unprimeable number, because it can be changed into a prime (21352122041447) 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, 93649657963 + ... + 93649658190.

It is an arithmetic number, because the mean of its divisors is an integer number (2809489742310).

Almost surely, 2^{21352122041442} is an apocalyptic number.

21352122041442 is an abundant number, since it is smaller than the sum of its proper divisors (23599713835518).

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

21352122041442 is a wasteful number, since it uses less digits than its factorization.

21352122041442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187299316177.

The product of its (nonzero) digits is 30720, while the sum is 33.

Adding to 21352122041442 its reverse (24414022125312), we get a palindrome (45766144166754).

The spelling of 21352122041442 in words is "twenty-one trillion, three hundred fifty-two billion, one hundred twenty-two million, forty-one thousand, four hundred forty-two".