2002221401 has 4 divisors (see below), whose sum is σ = 2002335972. Its totient is φ = 2002106832.

The previous prime is 2002221379. The next prime is 2002221409. The reversal of 2002221401 is 1041222002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1348652176 + 653569225 = 36724^2 + 25565^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002221401 - 2⁶ = 2002221337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002221409) 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, 25010 + ... + 68043.

It is an arithmetic number, because the mean of its divisors is an integer number (500583993).

Almost surely, 2^2002221401 is an apocalyptic number.

It is an amenable number.

2002221401 is a deficient number, since it is larger than the sum of its proper divisors (114571).

2002221401 is an equidigital number, since it uses as much as digits as its factorization.

2002221401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114570.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2002221401 is about 44746.1886756850. The cubic root of 2002221401 is about 1260.3873422804.

Adding to 2002221401 its reverse (1041222002), we get a palindrome (3043443403).

The spelling of 2002221401 in words is "two billion, two million, two hundred twenty-one thousand, four hundred one".