101212102121021 has 2 divisors, whose sum is σ = 101212102121022. Its totient is φ = 101212102121020.

The previous prime is 101212102121017. The next prime is 101212102121029. The reversal of 101212102121021 is 120121201212101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91896879273796 + 9315222847225 = 9586286^2 + 3052085^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212102121021 - 2² = 101212102121017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101212102121029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606051060510 + 50606051060511.

It is an arithmetic number, because the mean of its divisors is an integer number (50606051060511).

Almost surely, 2^{101212102121021} is an apocalyptic number.

It is an amenable number.

101212102121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101212102121021 is an equidigital number, since it uses as much as digits as its factorization.

101212102121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 101212102121021 its reverse (120121201212101), we get a palindrome (221333303333122).

The spelling of 101212102121021 in words is "one hundred one trillion, two hundred twelve billion, one hundred two million, one hundred twenty-one thousand, twenty-one".