2122202021221 has 24 divisors (see below), whose sum is σ = 2259605272320. Its totient is φ = 1992742397952.

The previous prime is 2122202021207. The next prime is 2122202021273. The reversal of 2122202021221 is 1221202022212.

It is not a de Polignac number, because 2122202021221 - 2¹⁵ = 2122201988453 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 (2122202021281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 347159061 + ... + 347165173.

It is an arithmetic number, because the mean of its divisors is an integer number (94150219680).

Almost surely, 2^{2122202021221} is an apocalyptic number.

It is an amenable number.

2122202021221 is a deficient number, since it is larger than the sum of its proper divisors (137403251099).

2122202021221 is a wasteful number, since it uses less digits than its factorization.

2122202021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8733 (or 8716 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2122202021221 its reverse (1221202022212), we get a palindrome (3343404043433).

Subtracting from 2122202021221 its reverse (1221202022212), we obtain a palindrome (900999999009).

It can be divided in two parts, 212220 and 2021221, that added together give a triangular number (2233441 = T₂₁₁₃).

The spelling of 2122202021221 in words is "two trillion, one hundred twenty-two billion, two hundred two million, twenty-one thousand, two hundred twenty-one".