21350121032 has 8 divisors (see below), whose sum is σ = 40031476950. Its totient is φ = 10675060512.

The previous prime is 21350121031. The next prime is 21350121061. The reversal of 21350121032 is 23012105312.

It can be written as a sum of positive squares in only one way, i.e., 16298607556 + 5051513476 = 127666^2 + 71074^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21350120995 and 21350121013.

It is not an unprimeable number, because it can be changed into a prime (21350121031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334382557 + ... + 1334382572.

Almost surely, 2^21350121032 is an apocalyptic number.

It is an amenable number.

21350121032 is a deficient number, since it is larger than the sum of its proper divisors (18681355918).

21350121032 is a wasteful number, since it uses less digits than its factorization.

21350121032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668765135 (or 2668765131 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21350121032 its reverse (23012105312), we get a palindrome (44362226344).

It can be divided in two parts, 21 and 350121032, that added together give a palindrome (350121053).

The spelling of 21350121032 in words is "twenty-one billion, three hundred fifty million, one hundred twenty-one thousand, thirty-two".