21040034212442 has 8 divisors (see below), whose sum is σ = 36068630078496. Its totient is φ = 9017157519612.

The previous prime is 21040034212441. The next prime is 21040034212487. The reversal of 21040034212442 is 24421243004012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21040034212441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751429793288 + ... + 751429793315.

It is an arithmetic number, because the mean of its divisors is an integer number (4508578759812).

Almost surely, 2^{21040034212442} is an apocalyptic number.

21040034212442 is a deficient number, since it is larger than the sum of its proper divisors (15028595866054).

21040034212442 is a wasteful number, since it uses less digits than its factorization.

21040034212442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502859586612.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21040034212442 its reverse (24421243004012), we get a palindrome (45461277216454).

The spelling of 21040034212442 in words is "twenty-one trillion, forty billion, thirty-four million, two hundred twelve thousand, four hundred forty-two".