220002001021 has 8 divisors (see below), whose sum is σ = 240242919264.
Its totient is φ = 199801205520.
The previous prime is 220002001007. The next prime is 220002001049. The reversal of 220002001021 is 120100200022.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 220002001021 - 25 = 220002000989 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 220002000989 and 220002001007.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (220002001061) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10019215 + ... + 10041148.
It is an arithmetic number, because the mean of its divisors is an integer number (30030364908).
Almost surely, 2220002001021 is an apocalyptic number.
It is an amenable number.
220002001021 is a deficient number, since it is larger than the sum of its proper divisors (20240918243).
220002001021 is a wasteful number, since it uses less digits than its factorization.
220002001021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 20061371.
The product of its (nonzero) digits is 16, while the sum is 10.
Adding to 220002001021 its reverse (120100200022), we get a palindrome (340102201043).
The spelling of 220002001021 in words is "two hundred twenty billion, two million, one thousand, twenty-one".