1020123224221 has 2 divisors, whose sum is σ = 1020123224222. Its totient is φ = 1020123224220.

The previous prime is 1020123224191. The next prime is 1020123224231. The reversal of 1020123224221 is 1224223210201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020120200100 + 3024121 = 1010010^2 + 1739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020123224221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020123224192 and 1020123224201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020123224231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510061612110 + 510061612111.

It is an arithmetic number, because the mean of its divisors is an integer number (510061612111).

Almost surely, 2^{1020123224221} is an apocalyptic number.

It is an amenable number.

1020123224221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020123224221 is an equidigital number, since it uses as much as digits as its factorization.

1020123224221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1020123224221 its reverse (1224223210201), we get a palindrome (2244346434422).

It can be divided in two parts, 102012 and 3224221, that added together give a palindrome (3326233).

The spelling of 1020123224221 in words is "one trillion, twenty billion, one hundred twenty-three million, two hundred twenty-four thousand, two hundred twenty-one".