4223122431021 has 24 divisors (see below), whose sum is σ = 6579062902776. Its totient is φ = 2594982942720.

The previous prime is 4223122431019. The next prime is 4223122431049. The reversal of 4223122431021 is 1201342213224.

4223122431021 is a `hidden beast` number, since 4 + 2 + 2 + 312 + 243 + 102 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 763098338025 + 3460024092996 = 873555^2 + 1860114^2 .

It is not a de Polignac number, because 4223122431021 - 2¹ = 4223122431019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4223122431001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26737800 + ... + 26895281.

It is an arithmetic number, because the mean of its divisors is an integer number (274127620949).

Almost surely, 2^{4223122431021} is an apocalyptic number.

It is an amenable number.

4223122431021 is a deficient number, since it is larger than the sum of its proper divisors (2355940471755).

4223122431021 is a wasteful number, since it uses less digits than its factorization.

4223122431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53633773 (or 53633770 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 4223122431021 its reverse (1201342213224), we get a palindrome (5424464644245).

The spelling of 4223122431021 in words is "four trillion, two hundred twenty-three billion, one hundred twenty-two million, four hundred thirty-one thousand, twenty-one".