21120141 has 32 divisors (see below), whose sum is σ = 34099200. Its totient is φ = 11366784.

The previous prime is 21120139. The next prime is 21120163. The reversal of 21120141 is 14102112.

It is a happy number.

It is not a de Polignac number, because 21120141 - 2¹ = 21120139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34960 + ... + 35558.

It is an arithmetic number, because the mean of its divisors is an integer number (1065600).

Almost surely, 2^21120141 is an apocalyptic number.

21120141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21120141 is a deficient number, since it is larger than the sum of its proper divisors (12979059).

21120141 is a wasteful number, since it uses less digits than its factorization.

21120141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 21120141 is about 4595.6654577983. The cubic root of 21120141 is about 276.4175443314.

Adding to 21120141 its reverse (14102112), we get a palindrome (35222253).

The spelling of 21120141 in words is "twenty-one million, one hundred twenty thousand, one hundred forty-one".