21160521252003 has 32 divisors (see below), whose sum is σ = 32277879728640. Its totient is φ = 12079252926720.

The previous prime is 21160521251929. The next prime is 21160521252049. The reversal of 21160521252003 is 30025212506112.

It is not a de Polignac number, because 21160521252003 - 2¹⁷ = 21160521120931 is a prime.

It is a super-2 number, since 2×21160521252003² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21160521252203) 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, 104774103 + ... + 104975871.

It is an arithmetic number, because the mean of its divisors is an integer number (1008683741520).

Almost surely, 2^{21160521252003} is an apocalyptic number.

21160521252003 is a deficient number, since it is larger than the sum of its proper divisors (11117358476637).

21160521252003 is a wasteful number, since it uses less digits than its factorization.

21160521252003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206907.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 21160521252003 its reverse (30025212506112), we get a palindrome (51185733758115).

The spelling of 21160521252003 in words is "twenty-one trillion, one hundred sixty billion, five hundred twenty-one million, two hundred fifty-two thousand, three".