21230011144442 has 16 divisors (see below), whose sum is σ = 31916458766880. Its totient is φ = 10591215552528.

The previous prime is 21230011144427. The next prime is 21230011144453. The reversal of 21230011144442 is 24444111003212.

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, 4228592 + ... + 7767947.

It is an arithmetic number, because the mean of its divisors is an integer number (1994778672930).

Almost surely, 2^{21230011144442} is an apocalyptic number.

21230011144442 is a deficient number, since it is larger than the sum of its proper divisors (10686447622438).

21230011144442 is a wasteful number, since it uses less digits than its factorization.

21230011144442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11998525.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21230011144442 its reverse (24444111003212), we get a palindrome (45674122147654).

The spelling of 21230011144442 in words is "twenty-one trillion, two hundred thirty billion, eleven million, one hundred forty-four thousand, four hundred forty-two".