2223100121221 has 24 divisors (see below), whose sum is σ = 2601371761560. Its totient is φ = 1894255114752.

The previous prime is 2223100121173. The next prime is 2223100121227. The reversal of 2223100121221 is 1221210013222.

It can be written as a sum of positive squares in 4 ways, for example, as 90609428196 + 2132490693025 = 301014^2 + 1460305^2 .

It is not a de Polignac number, because 2223100121221 - 2¹⁵ = 2223100088453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223100121227) 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, 6886495 + ... + 7202083.

It is an arithmetic number, because the mean of its divisors is an integer number (108390490065).

Almost surely, 2^{2223100121221} is an apocalyptic number.

It is an amenable number.

2223100121221 is a deficient number, since it is larger than the sum of its proper divisors (378271640339).

2223100121221 is a wasteful number, since it uses less digits than its factorization.

2223100121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316453 (or 316446 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2223100121221 its reverse (1221210013222), we get a palindrome (3444310134443).

The spelling of 2223100121221 in words is "two trillion, two hundred twenty-three billion, one hundred million, one hundred twenty-one thousand, two hundred twenty-one".