1022202221 has 4 divisors (see below), whose sum is σ = 1025098332. Its totient is φ = 1019306112.

The previous prime is 1022202211. The next prime is 1022202239. The reversal of 1022202221 is 1222022201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222022201 = 31 ⋅39420071.

It can be written as a sum of positive squares in 2 ways, for example, as 461175625 + 561026596 = 21475^2 + 23686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022202221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022202196 and 1022202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022202211) 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, 1447526 + ... + 1448231.

It is an arithmetic number, because the mean of its divisors is an integer number (256274583).

Almost surely, 2^1022202221 is an apocalyptic number.

It is an amenable number.

1022202221 is a deficient number, since it is larger than the sum of its proper divisors (2896111).

1022202221 is an equidigital number, since it uses as much as digits as its factorization.

1022202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896110.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1022202221 is about 31971.8973631532. The cubic root of 1022202221 is about 1007.3466351124.

Adding to 1022202221 its reverse (1222022201), we get a palindrome (2244224422).

The spelling of 1022202221 in words is "one billion, twenty-two million, two hundred two thousand, two hundred twenty-one".