20001011221201 has 8 divisors (see below), whose sum is σ = 20298681295200. Its totient is φ = 19705537974720.

The previous prime is 20001011221193. The next prime is 20001011221207. The reversal of 20001011221201 is 10212211010002.

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

It is a cyclic number.

It is not a de Polignac number, because 20001011221201 - 2³ = 20001011221193 is a prime.

It is a super-4 number, since 4×20001011221201⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001011221207) 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 7 ways as a sum of consecutive naturals, for example, 549188536 + ... + 549224953.

It is an arithmetic number, because the mean of its divisors is an integer number (2537335161900).

Almost surely, 2^{20001011221201} is an apocalyptic number.

It is an amenable number.

20001011221201 is a deficient number, since it is larger than the sum of its proper divisors (297670073999).

20001011221201 is a wasteful number, since it uses less digits than its factorization.

20001011221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098413759.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20001011221201 its reverse (10212211010002), we get a palindrome (30213222231203).

The spelling of 20001011221201 in words is "twenty trillion, one billion, eleven million, two hundred twenty-one thousand, two hundred one".