20101122020221 has 16 divisors (see below), whose sum is σ = 22247134040448. Its totient is φ = 18008442726400.

The previous prime is 20101122020219. The next prime is 20101122020297. The reversal of 20101122020221 is 12202022110102.

It is a happy number.

It is not a de Polignac number, because 20101122020221 - 2¹ = 20101122020219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101122020195 and 20101122020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101122029221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3886396 + ... + 7436821.

It is an arithmetic number, because the mean of its divisors is an integer number (1390445877528).

Almost surely, 2^{20101122020221} is an apocalyptic number.

It is an amenable number.

20101122020221 is a deficient number, since it is larger than the sum of its proper divisors (2146012020227).

20101122020221 is a wasteful number, since it uses less digits than its factorization.

20101122020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11325572.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20101122020221 its reverse (12202022110102), we get a palindrome (32303144130323).

The spelling of 20101122020221 in words is "twenty trillion, one hundred one billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".