21001141045 has 16 divisors (see below), whose sum is σ = 25313400000. Its totient is φ = 16726393728.

The previous prime is 21001141027. The next prime is 21001141087. The reversal of 21001141045 is 54014110012.

It is a cyclic number.

It is not a de Polignac number, because 21001141045 - 2⁹ = 21001140533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035361 + ... + 1055449.

It is an arithmetic number, because the mean of its divisors is an integer number (1582087500).

Almost surely, 2^21001141045 is an apocalyptic number.

It is an amenable number.

21001141045 is a deficient number, since it is larger than the sum of its proper divisors (4312258955).

21001141045 is a wasteful number, since it uses less digits than its factorization.

21001141045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21012.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 21001141045 its reverse (54014110012), we get a palindrome (75015251057).

The spelling of 21001141045 in words is "twenty-one billion, one million, one hundred forty-one thousand, forty-five".