21220013134 has 8 divisors (see below), whose sum is σ = 32158164528. Its totient is φ = 10500624960.

The previous prime is 21220013117. The next prime is 21220013137. The reversal of 21220013134 is 43131002212.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220013137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54690562 + ... + 54690949.

It is an arithmetic number, because the mean of its divisors is an integer number (4019770566).

Almost surely, 2^21220013134 is an apocalyptic number.

21220013134 is a deficient number, since it is larger than the sum of its proper divisors (10938151394).

21220013134 is a wasteful number, since it uses less digits than its factorization.

21220013134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109381610.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21220013134 its reverse (43131002212), we get a palindrome (64351015346).

The spelling of 21220013134 in words is "twenty-one billion, two hundred twenty million, thirteen thousand, one hundred thirty-four".