1222012001 has 4 divisors (see below), whose sum is σ = 1396585152. Its totient is φ = 1047438852.

The previous prime is 1222011977. The next prime is 1222012021. The reversal of 1222012001 is 1002102221.

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: 1002102221 = 29 ⋅34555249.

It is a cyclic number.

It is not a de Polignac number, because 1222012001 - 2²² = 1217817697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222012021) 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, 87286565 + ... + 87286578.

It is an arithmetic number, because the mean of its divisors is an integer number (349146288).

Almost surely, 2^1222012001 is an apocalyptic number.

It is an amenable number.

1222012001 is a deficient number, since it is larger than the sum of its proper divisors (174573151).

1222012001 is an equidigital number, since it uses as much as digits as its factorization.

1222012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174573150.

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

The square root of 1222012001 is about 34957.2882386492. The cubic root of 1222012001 is about 1069.1168072304.

Adding to 1222012001 its reverse (1002102221), we get a palindrome (2224114222).

The spelling of 1222012001 in words is "one billion, two hundred twenty-two million, twelve thousand, one".