21421034322104 has 16 divisors (see below), whose sum is σ = 40196596650000. Its totient is φ = 10701941882112.

The previous prime is 21421034322097. The next prime is 21421034322137. The reversal of 21421034322104 is 40122343012412.

It is a super-2 number, since 2×21421034322104² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071899252 + ... + 1071919235.

It is an arithmetic number, because the mean of its divisors is an integer number (2512287290625).

Almost surely, 2^{21421034322104} is an apocalyptic number.

It is an amenable number.

21421034322104 is a deficient number, since it is larger than the sum of its proper divisors (18775562327896).

21421034322104 is a wasteful number, since it uses less digits than its factorization.

21421034322104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143819742 (or 2143819738 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21421034322104 its reverse (40122343012412), we get a palindrome (61543377334516).

The spelling of 21421034322104 in words is "twenty-one trillion, four hundred twenty-one billion, thirty-four million, three hundred twenty-two thousand, one hundred four".