2121212220222 has 32 divisors (see below), whose sum is σ = 4369427737632. Its totient is φ = 686011797504.

The previous prime is 2121212220143. The next prime is 2121212220287. The reversal of 2121212220222 is 2220222121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13455643 + ... + 13612374.

It is an arithmetic number, because the mean of its divisors is an integer number (136544616801).

Almost surely, 2^{2121212220222} is an apocalyptic number.

2121212220222 is an abundant number, since it is smaller than the sum of its proper divisors (2248215517410).

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

2121212220222 is a wasteful number, since it uses less digits than its factorization.

2121212220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27068412.

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

Adding to 2121212220222 its reverse (2220222121212), we get a palindrome (4341434341434).

The spelling of 2121212220222 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, two hundred twenty-two".