1202220001 has 4 divisors (see below), whose sum is σ = 1207470100. Its totient is φ = 1196969904.

The previous prime is 1202219989. The next prime is 1202220013. The reversal of 1202220001 is 1000222021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1000222021 = 1987 ⋅503383.

It is an interprime number because it is at equal distance from previous prime (1202219989) and next prime (1202220013).

It can be written as a sum of positive squares in 2 ways, for example, as 1102240000 + 99980001 = 33200^2 + 9999^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202220001 - 2¹⁹ = 1201695713 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 1202220001.

It is not an unprimeable number, because it can be changed into a prime (1202220301) 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, 2624706 + ... + 2625163.

It is an arithmetic number, because the mean of its divisors is an integer number (301867525).

Almost surely, 2^1202220001 is an apocalyptic number.

It is an amenable number.

1202220001 is a deficient number, since it is larger than the sum of its proper divisors (5250099).

1202220001 is an equidigital number, since it uses as much as digits as its factorization.

1202220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250098.

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

The square root of 1202220001 is about 34673.0442995708. The cubic root of 1202220001 is about 1063.3134719045.

Adding to 1202220001 its reverse (1000222021), we get a palindrome (2202442022).

It can be divided in two parts, 12022 and 20001, that added together give a palindrome (32023).

The spelling of 1202220001 in words is "one billion, two hundred two million, two hundred twenty thousand, one".