21212221021141 has 2 divisors, whose sum is σ = 21212221021142. Its totient is φ = 21212221021140.

The previous prime is 21212221021133. The next prime is 21212221021219. The reversal of 21212221021141 is 14112012221212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13042542210916 + 8169678810225 = 3611446^2 + 2858265^2 .

It is a cyclic number.

It is not a de Polignac number, because 21212221021141 - 2³ = 21212221021133 is a prime.

It is a super-2 number, since 2×21212221021141² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212521021141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606110510570 + 10606110510571.

It is an arithmetic number, because the mean of its divisors is an integer number (10606110510571).

Almost surely, 2^{21212221021141} is an apocalyptic number.

It is an amenable number.

21212221021141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212221021141 is an equidigital number, since it uses as much as digits as its factorization.

21212221021141 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 21212221021141 its reverse (14112012221212), we get a palindrome (35324233242353).

The spelling of 21212221021141 in words is "twenty-one trillion, two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, one hundred forty-one".