20012001100221 has 32 divisors (see below), whose sum is σ = 29297763953920. Its totient is φ = 12076300191744.

The previous prime is 20012001100213. The next prime is 20012001100241. The reversal of 20012001100221 is 12200110021002.

It is not a de Polignac number, because 20012001100221 - 2³ = 20012001100213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012001100197 and 20012001100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012001100241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23853625 + ... + 24678318.

It is an arithmetic number, because the mean of its divisors is an integer number (915555123560).

Almost surely, 2^{20012001100221} is an apocalyptic number.

It is an amenable number.

20012001100221 is a deficient number, since it is larger than the sum of its proper divisors (9285762853699).

20012001100221 is a wasteful number, since it uses less digits than its factorization.

20012001100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48532165.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20012001100221 its reverse (12200110021002), we get a palindrome (32212111121223).

The spelling of 20012001100221 in words is "twenty trillion, twelve billion, one million, one hundred thousand, two hundred twenty-one".