21050141 has 8 divisors (see below), whose sum is σ = 24118080. Its totient is φ = 17997408.

The previous prime is 21050137. The next prime is 21050149. The reversal of 21050141 is 14105012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21050141 - 2² = 21050137 is a prime.

It is a super-2 number, since 2×21050141² = 886216872239762, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21050149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (3014760).

Almost surely, 2^21050141 is an apocalyptic number.

It is an amenable number.

21050141 is a deficient number, since it is larger than the sum of its proper divisors (3067939).

21050141 is an equidigital number, since it uses as much as digits as its factorization.

21050141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 21050141 is about 4588.0432648352. The cubic root of 21050141 is about 276.1118228182. Note that the first 3 decimals are identical.

Adding to 21050141 its reverse (14105012), we get a palindrome (35155153).

The spelling of 21050141 in words is "twenty-one million, fifty thousand, one hundred forty-one".