101021212021 has 2 divisors, whose sum is σ = 101021212022. Its totient is φ = 101021212020.

The previous prime is 101021212013. The next prime is 101021212037. The reversal of 101021212021 is 120212120101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71510782225 + 29510429796 = 267415^2 + 171786^2 .

It is a cyclic number.

It is not a de Polignac number, because 101021212021 - 2³ = 101021212013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101021211992 and 101021212010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101021212921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510606010 + 50510606011.

It is an arithmetic number, because the mean of its divisors is an integer number (50510606011).

Almost surely, 2^101021212021 is an apocalyptic number.

It is an amenable number.

101021212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101021212021 is an equidigital number, since it uses as much as digits as its factorization.

101021212021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 101021212021 its reverse (120212120101), we get a palindrome (221233332122).

The spelling of 101021212021 in words is "one hundred one billion, twenty-one million, two hundred twelve thousand, twenty-one".