4220204248621 has 4 divisors (see below), whose sum is σ = 4299830743932. Its totient is φ = 4140577753312.

The previous prime is 4220204248609. The next prime is 4220204248661. The reversal of 4220204248621 is 1268424020224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2415494122596 + 1804710126025 = 1554186^2 + 1343395^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220204248621 - 2²⁵ = 4220170694189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220204248661) 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, 39813247576 + ... + 39813247681.

It is an arithmetic number, because the mean of its divisors is an integer number (1074957685983).

Almost surely, 2^{4220204248621} is an apocalyptic number.

It is an amenable number.

4220204248621 is a deficient number, since it is larger than the sum of its proper divisors (79626495311).

4220204248621 is an equidigital number, since it uses as much as digits as its factorization.

4220204248621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79626495310.

The product of its (nonzero) digits is 98304, while the sum is 37.

Adding to 4220204248621 its reverse (1268424020224), we get a palindrome (5488628268845).

The spelling of 4220204248621 in words is "four trillion, two hundred twenty billion, two hundred four million, two hundred forty-eight thousand, six hundred twenty-one".