10221212020081 has 2 divisors, whose sum is σ = 10221212020082. Its totient is φ = 10221212020080.

The previous prime is 10221212020069. The next prime is 10221212020141. The reversal of 10221212020081 is 18002021212201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9970595640625 + 250616379456 = 3157625^2 + 500616^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221212020081 - 2¹⁵ = 10221211987313 is a prime.

It is a super-2 number, since 2×10221212020081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10221212020381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110606010040 + 5110606010041.

It is an arithmetic number, because the mean of its divisors is an integer number (5110606010041).

Almost surely, 2^{10221212020081} is an apocalyptic number.

It is an amenable number.

10221212020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221212020081 is an equidigital number, since it uses as much as digits as its factorization.

10221212020081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 10221212020081 its reverse (18002021212201), we get a palindrome (28223233232282).

It can be divided in two parts, 102212120 and 20081, that added together give a palindrome (102232201).

The spelling of 10221212020081 in words is "ten trillion, two hundred twenty-one billion, two hundred twelve million, twenty thousand, eighty-one".