101220212022121 has 2 divisors, whose sum is σ = 101220212022122. Its totient is φ = 101220212022120.

The previous prime is 101220212022103. The next prime is 101220212022161. The reversal of 101220212022121 is 121220212022101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67091481701721 + 34128730320400 = 8190939^2 + 5841980^2 .

It is an emirp because it is prime and its reverse (121220212022101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101220212022121 - 2⁹ = 101220212021609 is a prime.

It is not a weakly prime, because it can be changed into another prime (101220212022161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610106011060 + 50610106011061.

It is an arithmetic number, because the mean of its divisors is an integer number (50610106011061).

Almost surely, 2^{101220212022121} is an apocalyptic number.

It is an amenable number.

101220212022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220212022121 is an equidigital number, since it uses as much as digits as its factorization.

101220212022121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 101220212022121 its reverse (121220212022101), we get a palindrome (222440424044222).

The spelling of 101220212022121 in words is "one hundred one trillion, two hundred twenty billion, two hundred twelve million, twenty-two thousand, one hundred twenty-one".