21421126106 has 16 divisors (see below), whose sum is σ = 32694187680. Its totient is φ = 10523262480.

The previous prime is 21421126099. The next prime is 21421126147. The reversal of 21421126106 is 60162112412.

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, 170825 + ... + 268371.

It is an arithmetic number, because the mean of its divisors is an integer number (2043386730).

Almost surely, 2^21421126106 is an apocalyptic number.

21421126106 is a deficient number, since it is larger than the sum of its proper divisors (11273061574).

21421126106 is a wasteful number, since it uses less digits than its factorization.

21421126106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99469.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 21421126106 its reverse (60162112412), we get a palindrome (81583238518).

The spelling of 21421126106 in words is "twenty-one billion, four hundred twenty-one million, one hundred twenty-six thousand, one hundred six".