21011004030143 has 16 divisors (see below), whose sum is σ = 22194167356416. Its totient is φ = 19859470081920.

The previous prime is 21011004030113. The next prime is 21011004030199. The reversal of 21011004030143 is 34103040011012.

It is not a de Polignac number, because 21011004030143 - 2¹⁶ = 21011003964607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011004030113) 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, 30266471 + ... + 30952887.

It is an arithmetic number, because the mean of its divisors is an integer number (1387135459776).

Almost surely, 2^{21011004030143} is an apocalyptic number.

21011004030143 is a deficient number, since it is larger than the sum of its proper divisors (1183163326273).

21011004030143 is a wasteful number, since it uses less digits than its factorization.

21011004030143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709454.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21011004030143 its reverse (34103040011012), we get a palindrome (55114044041155).

The spelling of 21011004030143 in words is "twenty-one trillion, eleven billion, four million, thirty thousand, one hundred forty-three".