2123202023221 has 2 divisors, whose sum is σ = 2123202023222. Its totient is φ = 2123202023220.

The previous prime is 2123202023207. The next prime is 2123202023291. The reversal of 2123202023221 is 1223202023212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1412365864900 + 710836158321 = 1188430^2 + 843111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123202023221 - 2²⁵ = 2123168468789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123202023192 and 2123202023201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123202023291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061601011610 + 1061601011611.

It is an arithmetic number, because the mean of its divisors is an integer number (1061601011611).

Almost surely, 2^{2123202023221} is an apocalyptic number.

It is an amenable number.

2123202023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123202023221 is an equidigital number, since it uses as much as digits as its factorization.

2123202023221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 2123202023221 its reverse (1223202023212), we get a palindrome (3346404046433).

Subtracting from 2123202023221 its reverse (1223202023212), we obtain a palindrome (900000000009).

The spelling of 2123202023221 in words is "two trillion, one hundred twenty-three billion, two hundred two million, twenty-three thousand, two hundred twenty-one".