21034241221042 has 16 divisors (see below), whose sum is σ = 36064874868480. Its totient is φ = 9013130900928.

The previous prime is 21034241221033. The next prime is 21034241221051. The reversal of 21034241221042 is 24012214243012.

It is an interprime number because it is at equal distance from previous prime (21034241221033) and next prime (21034241221051).

It is a self number, because there is not a number n which added to its sum of digits gives 21034241221042.

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, 128574343 + ... + 128737834.

It is an arithmetic number, because the mean of its divisors is an integer number (2254054679280).

Almost surely, 2^{21034241221042} is an apocalyptic number.

21034241221042 is a deficient number, since it is larger than the sum of its proper divisors (15030633647438).

21034241221042 is a wasteful number, since it uses less digits than its factorization.

21034241221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257318025.

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

Adding to 21034241221042 its reverse (24012214243012), we get a palindrome (45046455464054).

The spelling of 21034241221042 in words is "twenty-one trillion, thirty-four billion, two hundred forty-one million, two hundred twenty-one thousand, forty-two".