220202002100021 has 8 divisors (see below), whose sum is σ = 220423608167904. Its totient is φ = 219980497113520.

The previous prime is 220202002099991. The next prime is 220202002100029. The reversal of 220202002100021 is 120001200202022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220202002100021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220202002099969 and 220202002100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220202002100029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20910851 + ... + 29625456.

It is an arithmetic number, because the mean of its divisors is an integer number (27552951020988).

Almost surely, 2^{220202002100021} is an apocalyptic number.

It is an amenable number.

220202002100021 is a deficient number, since it is larger than the sum of its proper divisors (221606067883).

220202002100021 is a wasteful number, since it uses less digits than its factorization.

220202002100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50540691.

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

Adding to 220202002100021 its reverse (120001200202022), we get a palindrome (340203202302043).

The spelling of 220202002100021 in words is "two hundred twenty trillion, two hundred two billion, two million, one hundred thousand, twenty-one".