20102011221221 has 8 divisors (see below), whose sum is σ = 20592430761984. Its totient is φ = 19616781305520.

The previous prime is 20102011221211. The next prime is 20102011221319. The reversal of 20102011221221 is 12212211020102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102011221221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102011221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102011221211) by changing a digit.

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, 1297398425 + ... + 1297413918.

It is an arithmetic number, because the mean of its divisors is an integer number (2574053845248).

Almost surely, 2^{20102011221221} is an apocalyptic number.

It is an amenable number.

20102011221221 is a deficient number, since it is larger than the sum of its proper divisors (490419540763).

20102011221221 is a wasteful number, since it uses less digits than its factorization.

20102011221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594812531.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20102011221221 its reverse (12212211020102), we get a palindrome (32314222241323).

The spelling of 20102011221221 in words is "twenty trillion, one hundred two billion, eleven million, two hundred twenty-one thousand, two hundred twenty-one".