21141003 has 16 divisors (see below), whose sum is σ = 30442496. Its totient is φ = 12972960.

The previous prime is 21140957. The next prime is 21141007. The reversal of 21141003 is 30014112.

It is a happy number.

It is not a de Polignac number, because 21141003 - 2¹⁴ = 21124619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21141003.

It is not an unprimeable number, because it can be changed into a prime (21141007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20838 + ... + 21828.

It is an arithmetic number, because the mean of its divisors is an integer number (1902656).

Almost surely, 2^21141003 is an apocalyptic number.

21141003 is a deficient number, since it is larger than the sum of its proper divisors (9301493).

21141003 is a wasteful number, since it uses less digits than its factorization.

21141003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21141003 is about 4597.9346450336. The cubic root of 21141003 is about 276.5085273910.

Adding to 21141003 its reverse (30014112), we get a palindrome (51155115).

It can be divided in two parts, 211 and 41003, that added together give a palindrome (41214).

The spelling of 21141003 in words is "twenty-one million, one hundred forty-one thousand, three".