122100021601 has 2 divisors, whose sum is σ = 122100021602. Its totient is φ = 122100021600.

The previous prime is 122100021577. The next prime is 122100021619. The reversal of 122100021601 is 106120001221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121874301025 + 225720576 = 349105^2 + 15024^2 .

It is a cyclic number.

It is not a de Polignac number, because 122100021601 - 2⁹ = 122100021089 is a prime.

It is not a weakly prime, because it can be changed into another prime (122100021691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61050010800 + 61050010801.

It is an arithmetic number, because the mean of its divisors is an integer number (61050010801).

Almost surely, 2^122100021601 is an apocalyptic number.

It is an amenable number.

122100021601 is a deficient number, since it is larger than the sum of its proper divisors (1).

122100021601 is an equidigital number, since it uses as much as digits as its factorization.

122100021601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 122100021601 its reverse (106120001221), we get a palindrome (228220022822).

The spelling of 122100021601 in words is "one hundred twenty-two billion, one hundred million, twenty-one thousand, six hundred one".