2122222021221 has 8 divisors (see below), whose sum is σ = 2837095403680. Its totient is φ = 1411081659792.

The previous prime is 2122222021123. The next prime is 2122222021289. The reversal of 2122222021221 is 1221202222212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2122222021221 - 2¹¹ = 2122222019173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122222021291) 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, 933253930 + ... + 933256203.

It is an arithmetic number, because the mean of its divisors is an integer number (354636925460).

Almost surely, 2^{2122222021221} is an apocalyptic number.

It is an amenable number.

2122222021221 is a deficient number, since it is larger than the sum of its proper divisors (714873382459).

2122222021221 is a wasteful number, since it uses less digits than its factorization.

2122222021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866510515.

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

Adding to 2122222021221 its reverse (1221202222212), we get a palindrome (3343424243433).

The spelling of 2122222021221 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty-one".