123001010221 has 2 divisors, whose sum is σ = 123001010222. Its totient is φ = 123001010220.

The previous prime is 123001010203. The next prime is 123001010261. The reversal of 123001010221 is 122010100321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96727842121 + 26273168100 = 311011^2 + 162090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123001010221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123001010261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61500505110 + 61500505111.

It is an arithmetic number, because the mean of its divisors is an integer number (61500505111).

Almost surely, 2^123001010221 is an apocalyptic number.

It is an amenable number.

123001010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

123001010221 is an equidigital number, since it uses as much as digits as its factorization.

123001010221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 123001010221 its reverse (122010100321), we get a palindrome (245011110542).

The spelling of 123001010221 in words is "one hundred twenty-three billion, one million, ten thousand, two hundred twenty-one".