2121221202222 has 16 divisors (see below), whose sum is σ = 4242927526272. Its totient is φ = 706992880440.

The previous prime is 2121221202187. The next prime is 2121221202223. The reversal of 2121221202222 is 2222021221212.

It is a super-2 number, since 2×2121221202222² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121221202223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20156554 + ... + 20261517.

It is an arithmetic number, because the mean of its divisors is an integer number (265182970392).

Almost surely, 2^{2121221202222} is an apocalyptic number.

2121221202222 is an abundant number, since it is smaller than the sum of its proper divisors (2121706324050).

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

2121221202222 is a wasteful number, since it uses less digits than its factorization.

2121221202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40426823.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2121221202222 its reverse (2222021221212), we get a palindrome (4343242423434).

The spelling of 2121221202222 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty-two".