4223111200421 has 2 divisors, whose sum is σ = 4223111200422. Its totient is φ = 4223111200420.

The previous prime is 4223111200381. The next prime is 4223111200481. The reversal of 4223111200421 is 1240021113224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2331072436225 + 1892038764196 = 1526785^2 + 1375514^2 .

It is a cyclic number.

It is not a de Polignac number, because 4223111200421 - 2¹⁰ = 4223111199397 is a prime.

It is a super-2 number, since 2×4223111200421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4223111200481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111555600210 + 2111555600211.

It is an arithmetic number, because the mean of its divisors is an integer number (2111555600211).

Almost surely, 2^{4223111200421} is an apocalyptic number.

It is an amenable number.

4223111200421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4223111200421 is an equidigital number, since it uses as much as digits as its factorization.

4223111200421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 4223111200421 its reverse (1240021113224), we get a palindrome (5463132313645).

The spelling of 4223111200421 in words is "four trillion, two hundred twenty-three billion, one hundred eleven million, two hundred thousand, four hundred twenty-one".