223111420421 has 4 divisors (see below), whose sum is σ = 223115061312. Its totient is φ = 223107779532.

The previous prime is 223111420391. The next prime is 223111420447. The reversal of 223111420421 is 124024111322.

223111420421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124024111322 = 2 ⋅62012055661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223111420421 is a prime.

It is a super-3 number, since 3×223111420421³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223111420481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726925 + ... + 1851618.

It is an arithmetic number, because the mean of its divisors is an integer number (55778765328).

Almost surely, 2^223111420421 is an apocalyptic number.

It is an amenable number.

223111420421 is a deficient number, since it is larger than the sum of its proper divisors (3640891).

223111420421 is an equidigital number, since it uses as much as digits as its factorization.

223111420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640890.

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

Adding to 223111420421 its reverse (124024111322), we get a palindrome (347135531743).

The spelling of 223111420421 in words is "two hundred twenty-three billion, one hundred eleven million, four hundred twenty thousand, four hundred twenty-one".