2202101121221 has 4 divisors (see below), whose sum is σ = 2210669608332. Its totient is φ = 2193532634112.

The previous prime is 2202101121211. The next prime is 2202101121229. The reversal of 2202101121221 is 1221211012022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2082208596196 + 119892525025 = 1442986^2 + 346255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202101121221 - 2³⁴ = 2184921252037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2202101121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202101121229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4284243170 + ... + 4284243683.

It is an arithmetic number, because the mean of its divisors is an integer number (552667402083).

Almost surely, 2^{2202101121221} is an apocalyptic number.

It is an amenable number.

2202101121221 is a deficient number, since it is larger than the sum of its proper divisors (8568487111).

2202101121221 is an equidigital number, since it uses as much as digits as its factorization.

2202101121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8568487110.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2202101121221 its reverse (1221211012022), we get a palindrome (3423312133243).

It can be divided in two parts, 220210 and 1121221, that added together give a palindrome (1341431).

The spelling of 2202101121221 in words is "two trillion, two hundred two billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty-one".