20010220011221 has 24 divisors (see below), whose sum is σ = 22307991928992. Its totient is φ = 17932950279200.

The previous prime is 20010220011211. The next prime is 20010220011259. The reversal of 20010220011221 is 12211002201002.

It is not a de Polignac number, because 20010220011221 - 2³⁴ = 19993040142037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20010220011196 and 20010220011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010220011211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2468810 + ... + 6790836.

It is an arithmetic number, because the mean of its divisors is an integer number (929499663708).

Almost surely, 2^{20010220011221} is an apocalyptic number.

It is an amenable number.

20010220011221 is a deficient number, since it is larger than the sum of its proper divisors (2297771917771).

20010220011221 is a wasteful number, since it uses less digits than its factorization.

20010220011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322593 (or 4322582 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20010220011221 its reverse (12211002201002), we get a palindrome (32221222212223).

The spelling of 20010220011221 in words is "twenty trillion, ten billion, two hundred twenty million, eleven thousand, two hundred twenty-one".