21141061 has 2 divisors, whose sum is σ = 21141062. Its totient is φ = 21141060.

The previous prime is 21141041. The next prime is 21141067. The reversal of 21141061 is 16014112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14861025 + 6280036 = 3855^2 + 2506^2 .

It is a cyclic number.

It is not a de Polignac number, because 21141061 - 2⁹ = 21140549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21141067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570530 + 10570531.

It is an arithmetic number, because the mean of its divisors is an integer number (10570531).

Almost surely, 2^21141061 is an apocalyptic number.

It is an amenable number.

21141061 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141061 is an equidigital number, since it uses as much as digits as its factorization.

21141061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21141061 is about 4597.9409522089. The cubic root of 21141061 is about 276.5087802563.

Adding to 21141061 its reverse (16014112), we get a palindrome (37155173).

The spelling of 21141061 in words is "twenty-one million, one hundred forty-one thousand, sixty-one".