20010211221101 has 4 divisors (see below), whose sum is σ = 20013452797212. Its totient is φ = 20006969644992.

The previous prime is 20010211221089. The next prime is 20010211221137. The reversal of 20010211221101 is 10112211201002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8867733559876 + 11142477661225 = 2977874^2 + 3338035^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010211221101 - 2³⁸ = 19735333314157 is a prime.

It is a super-2 number, since 2×20010211221101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010211229101) 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 3 ways as a sum of consecutive naturals, for example, 1620778796 + ... + 1620791141.

It is an arithmetic number, because the mean of its divisors is an integer number (5003363199303).

Almost surely, 2^{20010211221101} is an apocalyptic number.

It is an amenable number.

20010211221101 is a deficient number, since it is larger than the sum of its proper divisors (3241576111).

20010211221101 is an equidigital number, since it uses as much as digits as its factorization.

20010211221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241576110.

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

Adding to 20010211221101 its reverse (10112211201002), we get a palindrome (30122422422103).

The spelling of 20010211221101 in words is "twenty trillion, ten billion, two hundred eleven million, two hundred twenty-one thousand, one hundred one".