1222210001 has 4 divisors (see below), whose sum is σ = 1223035632. Its totient is φ = 1221384372.

The previous prime is 1222209983. The next prime is 1222210007. The reversal of 1222210001 is 1000122221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1000122221 = 7 ⋅142874603.

It is a cyclic number.

It is not a de Polignac number, because 1222210001 - 2²² = 1218015697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222210007) 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, 410591 + ... + 413556.

It is an arithmetic number, because the mean of its divisors is an integer number (305758908).

Almost surely, 2^1222210001 is an apocalyptic number.

It is an amenable number.

1222210001 is a deficient number, since it is larger than the sum of its proper divisors (825631).

1222210001 is an equidigital number, since it uses as much as digits as its factorization.

1222210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825630.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1222210001 is about 34960.1201513954. The cubic root of 1222210001 is about 1069.1745463513.

Adding to 1222210001 its reverse (1000122221), we get a palindrome (2222332222).

The spelling of 1222210001 in words is "one billion, two hundred twenty-two million, two hundred ten thousand, one".