21030232171352 has 32 divisors (see below), whose sum is σ = 41874356127600. Its totient is φ = 9873532376064.

The previous prime is 21030232171283. The next prime is 21030232171357. The reversal of 21030232171352 is 25317123203012.

It is a super-3 number, since 3×21030232171352³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030232171357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612181013 + ... + 612215364.

Almost surely, 2^{21030232171352} is an apocalyptic number.

It is an amenable number.

21030232171352 is a deficient number, since it is larger than the sum of its proper divisors (20844123956248).

21030232171352 is a wasteful number, since it uses less digits than its factorization.

21030232171352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224396515 (or 1224396511 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

Adding to 21030232171352 its reverse (25317123203012), we get a palindrome (46347355374364).

The spelling of 21030232171352 in words is "twenty-one trillion, thirty billion, two hundred thirty-two million, one hundred seventy-one thousand, three hundred fifty-two".