1221322010223 has 32 divisors (see below), whose sum is σ = 1931065959424. Its totient is φ = 672035761152.

The previous prime is 1221322010197. The next prime is 1221322010243. The reversal of 1221322010223 is 3220102231221.

It is not a de Polignac number, because 1221322010223 - 2¹³ = 1221322002031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1221322010223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221322010243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8026915 + ... + 8177652.

It is an arithmetic number, because the mean of its divisors is an integer number (60345811232).

Almost surely, 2^{1221322010223} is an apocalyptic number.

1221322010223 is a deficient number, since it is larger than the sum of its proper divisors (709743949201).

1221322010223 is a wasteful number, since it uses less digits than its factorization.

1221322010223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16204711.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1221322010223 its reverse (3220102231221), we get a palindrome (4441424241444).

The spelling of 1221322010223 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-two million, ten thousand, two hundred twenty-three".