122101201021 has 2 divisors, whose sum is σ = 122101201022. Its totient is φ = 122101201020.

The previous prime is 122101201009. The next prime is 122101201043. The reversal of 122101201021 is 120102101221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116049916921 + 6051284100 = 340661^2 + 77790^2 .

It is a cyclic number.

It is not a de Polignac number, because 122101201021 - 2²¹ = 122099103869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122101200992 and 122101201010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122101202021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61050600510 + 61050600511.

It is an arithmetic number, because the mean of its divisors is an integer number (61050600511).

Almost surely, 2^122101201021 is an apocalyptic number.

It is an amenable number.

122101201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122101201021 is an equidigital number, since it uses as much as digits as its factorization.

122101201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 122101201021 its reverse (120102101221), we get a palindrome (242203302242).

The spelling of 122101201021 in words is "one hundred twenty-two billion, one hundred one million, two hundred one thousand, twenty-one".