1011212102221 has 2 divisors, whose sum is σ = 1011212102222. Its totient is φ = 1011212102220.

The previous prime is 1011212102213. The next prime is 1011212102279. The reversal of 1011212102221 is 1222012121101.

1011212102221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 560984522121 + 450227580100 = 748989^2 + 670990^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011212102221 - 2³ = 1011212102213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011212102195 and 1011212102204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011212102321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505606051110 + 505606051111.

It is an arithmetic number, because the mean of its divisors is an integer number (505606051111).

Almost surely, 2^{1011212102221} is an apocalyptic number.

It is an amenable number.

1011212102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011212102221 is an equidigital number, since it uses as much as digits as its factorization.

1011212102221 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 16.

Adding to 1011212102221 its reverse (1222012121101), we get a palindrome (2233224223322).

The spelling of 1011212102221 in words is "one trillion, eleven billion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".