122220001 has 4 divisors (see below), whose sum is σ = 123362352. Its totient is φ = 121077652.

The previous prime is 122219983. The next prime is 122220019. The reversal of 122220001 is 100022221.

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.

It is an interprime number because it is at equal distance from previous prime (122219983) and next prime (122220019).

It is a cyclic number.

It is not a de Polignac number, because 122220001 - 2²⁵ = 88665569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122220001.

It is not an unprimeable number, because it can be changed into a prime (122220041) 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, 571015 + ... + 571228.

It is an arithmetic number, because the mean of its divisors is an integer number (30840588).

Almost surely, 2^122220001 is an apocalyptic number.

It is an amenable number.

122220001 is a deficient number, since it is larger than the sum of its proper divisors (1142351).

122220001 is a wasteful number, since it uses less digits than its factorization.

122220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142350.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 122220001 is about 11055.3155088401. The cubic root of 122220001 is about 496.2655112985.

Adding to 122220001 its reverse (100022221), we get a palindrome (222242222).

The spelling of 122220001 in words is "one hundred twenty-two million, two hundred twenty thousand, one".