20001100212222 has 32 divisors (see below), whose sum is σ = 41383219440672. Its totient is φ = 6439494081024.

The previous prime is 20001100212187. The next prime is 20001100212227. The reversal of 20001100212222 is 22221200110002.

It is a super-3 number, since 3×20001100212222³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001100212227) 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, 328783623 + ... + 328844450.

It is an arithmetic number, because the mean of its divisors is an integer number (1293225607521).

Almost surely, 2^{20001100212222} is an apocalyptic number.

20001100212222 is an abundant number, since it is smaller than the sum of its proper divisors (21382119228450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001100212222 is a wasteful number, since it uses less digits than its factorization.

20001100212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657628252.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20001100212222 its reverse (22221200110002), we get a palindrome (42222300322224).

The spelling of 20001100212222 in words is "twenty trillion, one billion, one hundred million, two hundred twelve thousand, two hundred twenty-two".