21043002411442 has 16 divisors (see below), whose sum is σ = 34434132207552. Its totient is φ = 9564965467920.

The previous prime is 21043002411421. The next prime is 21043002411491. The reversal of 21043002411442 is 24411420034012.

It is a self number, because there is not a number n which added to its sum of digits gives 21043002411442.

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, 4799323 + ... + 8069665.

It is an arithmetic number, because the mean of its divisors is an integer number (2152133262972).

Almost surely, 2^{21043002411442} is an apocalyptic number.

21043002411442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21043002411442 is a deficient number, since it is larger than the sum of its proper divisors (13391129796110).

21043002411442 is a wasteful number, since it uses less digits than its factorization.

21043002411442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562833.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21043002411442 its reverse (24411420034012), we get a palindrome (45454422445454).

The spelling of 21043002411442 in words is "twenty-one trillion, forty-three billion, two million, four hundred eleven thousand, four hundred forty-two".