21221101102010 has 16 divisors (see below), whose sum is σ = 38199599117856. Its totient is φ = 8488081077648.

The previous prime is 21221101102007. The next prime is 21221101102049. The reversal of 21221101102010 is 1020110112212.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 44672312 + ... + 45144851.

It is an arithmetic number, because the mean of its divisors is an integer number (2387474944866).

Almost surely, 2^{21221101102010} is an apocalyptic number.

21221101102010 is a deficient number, since it is larger than the sum of its proper divisors (16978498015846).

21221101102010 is a wasteful number, since it uses less digits than its factorization.

21221101102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89840797.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21221101102010 its reverse (1020110112212), we get a palindrome (22241211214222).

The spelling of 21221101102010 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred one million, one hundred two thousand, ten".