21212202112141 has 2 divisors, whose sum is σ = 21212202112142. Its totient is φ = 21212202112140.

The previous prime is 21212202112117. The next prime is 21212202112217. The reversal of 21212202112141 is 14121120221212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11989744189641 + 9222457922500 = 3462621^2 + 3036850^2 .

It is a cyclic number.

It is not a de Polignac number, because 21212202112141 - 2¹⁵ = 21212202079373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212202112741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606101056070 + 10606101056071.

It is an arithmetic number, because the mean of its divisors is an integer number (10606101056071).

Almost surely, 2^{21212202112141} is an apocalyptic number.

It is an amenable number.

21212202112141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212202112141 is an equidigital number, since it uses as much as digits as its factorization.

21212202112141 is an evil number, because the sum of its binary digits is even.

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

Adding to 21212202112141 its reverse (14121120221212), we get a palindrome (35333322333353).

The spelling of 21212202112141 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, one hundred twelve thousand, one hundred forty-one".