2220123321221 has 4 divisors (see below), whose sum is σ = 2390902038252. Its totient is φ = 2049344604192.

The previous prime is 2220123321203. The next prime is 2220123321233. The reversal of 2220123321221 is 1221233210222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 721981593025 + 1498141728196 = 849695^2 + 1223986^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220123321221 - 2³⁴ = 2202943452037 is a prime.

It is a super-2 number, since 2×2220123321221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222123321221) 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, 85389358496 + ... + 85389358521.

It is an arithmetic number, because the mean of its divisors is an integer number (597725509563).

Almost surely, 2^{2220123321221} is an apocalyptic number.

It is an amenable number.

2220123321221 is a deficient number, since it is larger than the sum of its proper divisors (170778717031).

2220123321221 is a wasteful number, since it uses less digits than its factorization.

2220123321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170778717030.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2220123321221 its reverse (1221233210222), we get a palindrome (3441356531443).

The spelling of 2220123321221 in words is "two trillion, two hundred twenty billion, one hundred twenty-three million, three hundred twenty-one thousand, two hundred twenty-one".