21211524141061 has 2 divisors, whose sum is σ = 21211524141062. Its totient is φ = 21211524141060.

The previous prime is 21211524141013. The next prime is 21211524141103. The reversal of 21211524141061 is 16014142511212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20751441390625 + 460082750436 = 4555375^2 + 678294^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211524141061 - 2²¹ = 21211522043909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211525141061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605762070530 + 10605762070531.

It is an arithmetic number, because the mean of its divisors is an integer number (10605762070531).

Almost surely, 2^{21211524141061} is an apocalyptic number.

It is an amenable number.

21211524141061 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211524141061 is an equidigital number, since it uses as much as digits as its factorization.

21211524141061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 31.

Adding to 21211524141061 its reverse (16014142511212), we get a palindrome (37225666652273).

The spelling of 21211524141061 in words is "twenty-one trillion, two hundred eleven billion, five hundred twenty-four million, one hundred forty-one thousand, sixty-one".