21142433111442 has 16 divisors (see below), whose sum is σ = 42978060751872. Its totient is φ = 6931945282320.

The previous prime is 21142433111399. The next prime is 21142433111549. The reversal of 21142433111442 is 24411133424112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28883104978 + ... + 28883105709.

It is an arithmetic number, because the mean of its divisors is an integer number (2686128796992).

Almost surely, 2^{21142433111442} is an apocalyptic number.

21142433111442 is an abundant number, since it is smaller than the sum of its proper divisors (21835627640430).

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

21142433111442 is a wasteful number, since it uses less digits than its factorization.

21142433111442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57766210753.

The product of its digits is 18432, while the sum is 33.

Adding to 21142433111442 its reverse (24411133424112), we get a palindrome (45553566535554).

The spelling of 21142433111442 in words is "twenty-one trillion, one hundred forty-two billion, four hundred thirty-three million, one hundred eleven thousand, four hundred forty-two".