101212222081 has 2 divisors, whose sum is σ = 101212222082. Its totient is φ = 101212222080.

The previous prime is 101212222073. The next prime is 101212222123. The reversal of 101212222081 is 180222212101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71310895681 + 29901326400 = 267041^2 + 172920^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212222081 - 2³ = 101212222073 is a prime.

It is a super-2 number, since 2×101212222081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101212222031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606111040 + 50606111041.

It is an arithmetic number, because the mean of its divisors is an integer number (50606111041).

Almost surely, 2^101212222081 is an apocalyptic number.

It is an amenable number.

101212222081 is a deficient number, since it is larger than the sum of its proper divisors (1).

101212222081 is an equidigital number, since it uses as much as digits as its factorization.

101212222081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 101212222081 its reverse (180222212101), we get a palindrome (281434434182).

The spelling of 101212222081 in words is "one hundred one billion, two hundred twelve million, two hundred twenty-two thousand, eighty-one".