21121466432 has 56 divisors (see below), whose sum is σ = 48129687840. Its totient is φ = 9095362560.

The previous prime is 21121466419. The next prime is 21121466447. The reversal of 21121466432 is 23466412112.

It is a super-2 number, since 2×21121466432² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776153 + ... + 802904.

Almost surely, 2^21121466432 is an apocalyptic number.

21121466432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21121466432 is an abundant number, since it is smaller than the sum of its proper divisors (27008221408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121466432 is a wasteful number, since it uses less digits than its factorization.

21121466432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579099 (or 1579089 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

Adding to 21121466432 its reverse (23466412112), we get a palindrome (44587878544).

The spelling of 21121466432 in words is "twenty-one billion, one hundred twenty-one million, four hundred sixty-six thousand, four hundred thirty-two".