27121234020 has 24 divisors (see below), whose sum is σ = 75939455424. Its totient is φ = 7232329056.

The previous prime is 27121233989. The next prime is 27121234037. The reversal of 27121234020 is 2043212172.

It is a super-2 number, since 2×27121234020² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226010224 + ... + 226010343.

It is an arithmetic number, because the mean of its divisors is an integer number (3164143976).

Almost surely, 2^27121234020 is an apocalyptic number.

27121234020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27121234020 is an abundant number, since it is smaller than the sum of its proper divisors (48818221404).

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

27121234020 is a wasteful number, since it uses less digits than its factorization.

27121234020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452020579 (or 452020577 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

Adding to 27121234020 its reverse (2043212172), we get a palindrome (29164446192).

The spelling of 27121234020 in words is "twenty-seven billion, one hundred twenty-one million, two hundred thirty-four thousand, twenty".