4223124020021 has 4 divisors (see below), whose sum is σ = 4406738107872. Its totient is φ = 4039509932172.

The previous prime is 4223124019969. The next prime is 4223124020023. The reversal of 4223124020021 is 1200204213224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4223124020021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 183614087827 = 4223124020021 / (4 + 2 + 2 + 3 + 1 + 2 + 4 + 0 + 2 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4223124020023) 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, 91807043891 + ... + 91807043936.

It is an arithmetic number, because the mean of its divisors is an integer number (1101684526968).

Almost surely, 2^{4223124020021} is an apocalyptic number.

It is an amenable number.

4223124020021 is a deficient number, since it is larger than the sum of its proper divisors (183614087851).

4223124020021 is a wasteful number, since it uses less digits than its factorization.

4223124020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183614087850.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 4223124020021 its reverse (1200204213224), we get a palindrome (5423328233245).

The spelling of 4223124020021 in words is "four trillion, two hundred twenty-three billion, one hundred twenty-four million, twenty thousand, twenty-one".