20101202020221 has 192 divisors, whose sum is σ = 33459093577728. Its totient is φ = 10494469472256.

The previous prime is 20101202020219. The next prime is 20101202020223. The reversal of 20101202020221 is 12202020210102.

It is an interprime number because it is at equal distance from previous prime (20101202020219) and next prime (20101202020223).

It is not a de Polignac number, because 20101202020221 - 2¹ = 20101202020219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20101202020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101202020223) 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 191 ways as a sum of consecutive naturals, for example, 17433825981 + ... + 17433827133.

It is an arithmetic number, because the mean of its divisors is an integer number (174266112384).

Almost surely, 2^{20101202020221} is an apocalyptic number.

20101202020221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20101202020221 is a deficient number, since it is larger than the sum of its proper divisors (13357891557507).

20101202020221 is a wasteful number, since it uses less digits than its factorization.

20101202020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20101202020221 its reverse (12202020210102), we get a palindrome (32303222230323).

The spelling of 20101202020221 in words is "twenty trillion, one hundred one billion, two hundred two million, twenty thousand, two hundred twenty-one".