1222000001 has 4 divisors (see below), whose sum is σ = 1293882372. Its totient is φ = 1150117632.

The previous prime is 1221999997. The next prime is 1222000009. The reversal of 1222000001 is 1000002221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1000002221 = 47 ⋅21276643.

It can be written as a sum of positive squares in 2 ways, for example, as 425349376 + 796650625 = 20624^2 + 28225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222000001 - 2² = 1221999997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222000009) 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, 35941160 + ... + 35941193.

It is an arithmetic number, because the mean of its divisors is an integer number (323470593).

Almost surely, 2^1222000001 is an apocalyptic number.

It is an amenable number.

1222000001 is a deficient number, since it is larger than the sum of its proper divisors (71882371).

1222000001 is an equidigital number, since it uses as much as digits as its factorization.

1222000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71882370.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1222000001 is about 34957.1166002003. The cubic root of 1222000001 is about 1069.1133076893.

Adding to 1222000001 its reverse (1000002221), we get a palindrome (2222002222).

The spelling of 1222000001 in words is "one billion, two hundred twenty-two million, one", and thus it is an aban number.