20021100021222 has 64 divisors (see below), whose sum is σ = 41315271630336. Its totient is φ = 6465156938240.

The previous prime is 20021100021203. The next prime is 20021100021257. The reversal of 20021100021222 is 22212000112002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8391397 + ... + 10509887.

It is an arithmetic number, because the mean of its divisors is an integer number (645551119224).

Almost surely, 2^{20021100021222} is an apocalyptic number.

20021100021222 is an abundant number, since it is smaller than the sum of its proper divisors (21294171609114).

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

20021100021222 is a wasteful number, since it uses less digits than its factorization.

20021100021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118925.

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

Adding to 20021100021222 its reverse (22212000112002), we get a palindrome (42233100133224).

The spelling of 20021100021222 in words is "twenty trillion, twenty-one billion, one hundred million, twenty-one thousand, two hundred twenty-two".