21110212001101 has 2 divisors, whose sum is σ = 21110212001102. Its totient is φ = 21110212001100.

The previous prime is 21110212001059. The next prime is 21110212001147. The reversal of 21110212001101 is 10110021201112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13203964643076 + 7906247358025 = 3633726^2 + 2811805^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110212001101 - 2⁷ = 21110212000973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110212031101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555106000550 + 10555106000551.

It is an arithmetic number, because the mean of its divisors is an integer number (10555106000551).

Almost surely, 2^{21110212001101} is an apocalyptic number.

It is an amenable number.

21110212001101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110212001101 is an equidigital number, since it uses as much as digits as its factorization.

21110212001101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21110212001101 its reverse (10110021201112), we get a palindrome (31220233202213).

The spelling of 21110212001101 in words is "twenty-one trillion, one hundred ten billion, two hundred twelve million, one thousand, one hundred one".