20011000120221 has 16 divisors (see below), whose sum is σ = 29109853698048. Its totient is φ = 12126652014000.

The previous prime is 20011000120151. The next prime is 20011000120297. The reversal of 20011000120221 is 12202100011002.

It is not a de Polignac number, because 20011000120221 - 2²¹ = 20010998023069 is a prime.

It is a super-2 number, since 2×20011000120221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011000120197 and 20011000120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011000120621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30339955 + ... + 30992496.

It is an arithmetic number, because the mean of its divisors is an integer number (1819365856128).

Almost surely, 2^{20011000120221} is an apocalyptic number.

It is an amenable number.

20011000120221 is a deficient number, since it is larger than the sum of its proper divisors (9098853577827).

20011000120221 is a wasteful number, since it uses less digits than its factorization.

20011000120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61342352.

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

Adding to 20011000120221 its reverse (12202100011002), we get a palindrome (32213100131223).

The spelling of 20011000120221 in words is "twenty trillion, eleven billion, one hundred twenty thousand, two hundred twenty-one".