2202111211021 has 4 divisors (see below), whose sum is σ = 2202114734044. Its totient is φ = 2202107688000.

The previous prime is 2202111210983. The next prime is 2202111211037. The reversal of 2202111211021 is 1201121112022.

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 2064035055625 + 138076155396 = 1436675^2 + 371586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202111211021 - 2³¹ = 2199963727373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2202111210986 and 2202111211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202111211051) 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, 542910 + ... + 2167711.

It is an arithmetic number, because the mean of its divisors is an integer number (550528683511).

Almost surely, 2^{2202111211021} is an apocalyptic number.

It is an amenable number.

2202111211021 is a deficient number, since it is larger than the sum of its proper divisors (3523023).

2202111211021 is an equidigital number, since it uses as much as digits as its factorization.

2202111211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523022.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2202111211021 its reverse (1201121112022), we get a palindrome (3403232323043).

The spelling of 2202111211021 in words is "two trillion, two hundred two billion, one hundred eleven million, two hundred eleven thousand, twenty-one".