2122122001 has 4 divisors (see below), whose sum is σ = 2126766052. Its totient is φ = 2117477952.

The previous prime is 2122121977. The next prime is 2122122017. The reversal of 2122122001 is 1002212212.

It is a happy number.

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 1725156225 + 396965776 = 41535^2 + 19924^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122122001 - 2¹³ = 2122113809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2122122031) 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, 2321340 + ... + 2322253.

It is an arithmetic number, because the mean of its divisors is an integer number (531691513).

Almost surely, 2^2122122001 is an apocalyptic number.

It is an amenable number.

2122122001 is a deficient number, since it is larger than the sum of its proper divisors (4644051).

2122122001 is an equidigital number, since it uses as much as digits as its factorization.

2122122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644050.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2122122001 is about 46066.4954278052. The cubic root of 2122122001 is about 1285.0601295123.

Adding to 2122122001 its reverse (1002212212), we get a palindrome (3124334213).

The spelling of 2122122001 in words is "two billion, one hundred twenty-two million, one hundred twenty-two thousand, one".