2110101212221 has 2 divisors, whose sum is σ = 2110101212222. Its totient is φ = 2110101212220.

The previous prime is 2110101212183. The next prime is 2110101212249. The reversal of 2110101212221 is 1222121010112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1330818339321 + 779282872900 = 1153611^2 + 882770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2110101212221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2110101212195 and 2110101212204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2110101212281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055050606110 + 1055050606111.

It is an arithmetic number, because the mean of its divisors is an integer number (1055050606111).

Almost surely, 2^{2110101212221} is an apocalyptic number.

It is an amenable number.

2110101212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110101212221 is an equidigital number, since it uses as much as digits as its factorization.

2110101212221 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 2110101212221 its reverse (1222121010112), we get a palindrome (3332222222333).

The spelling of 2110101212221 in words is "two trillion, one hundred ten billion, one hundred one million, two hundred twelve thousand, two hundred twenty-one".