21203141043 has 8 divisors (see below), whose sum is σ = 32309548288. Its totient is φ = 12116080584.

The previous prime is 21203141033. The next prime is 21203141111. The reversal of 21203141043 is 34014130212.

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

It is not a de Polignac number, because 21203141043 - 2¹⁶ = 21203075507 is a prime.

It is a super-2 number, since 2×21203141043² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1009673383 = 21203141043 / (2 + 1 + 2 + 0 + 3 + 1 + 4 + 1 + 0 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203141033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504836671 + ... + 504836712.

It is an arithmetic number, because the mean of its divisors is an integer number (4038693536).

Almost surely, 2^21203141043 is an apocalyptic number.

21203141043 is a deficient number, since it is larger than the sum of its proper divisors (11106407245).

21203141043 is a wasteful number, since it uses less digits than its factorization.

21203141043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009673393.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21203141043 its reverse (34014130212), we get a palindrome (55217271255).

The spelling of 21203141043 in words is "twenty-one billion, two hundred three million, one hundred forty-one thousand, forty-three".