223021221351 has 32 divisors (see below), whose sum is σ = 301608960960. Its totient is φ = 146573328384.

The previous prime is 223021221329. The next prime is 223021221377. The reversal of 223021221351 is 153122120322.

It is not a de Polignac number, because 223021221351 - 2²³ = 223012832743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223021221391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63194955 + ... + 63198483.

It is an arithmetic number, because the mean of its divisors is an integer number (9425280030).

Almost surely, 2^223021221351 is an apocalyptic number.

223021221351 is a deficient number, since it is larger than the sum of its proper divisors (78587739609).

223021221351 is a wasteful number, since it uses less digits than its factorization.

223021221351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4595.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 223021221351 its reverse (153122120322), we get a palindrome (376143341673).

The spelling of 223021221351 in words is "two hundred twenty-three billion, twenty-one million, two hundred twenty-one thousand, three hundred fifty-one".