12122010021 has 48 divisors (see below), whose sum is σ = 19269823104. Its totient is φ = 6745728000.

The previous prime is 12122009989. The next prime is 12122010071. The reversal of 12122010021 is 12001022121.

It is not a de Polignac number, because 12122010021 - 2⁵ = 12122009989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12122009979 and 12122010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122010071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 229056 + ... + 276966.

It is an arithmetic number, because the mean of its divisors is an integer number (401454648).

Almost surely, 2^12122010021 is an apocalyptic number.

12122010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12122010021 is a deficient number, since it is larger than the sum of its proper divisors (7147813083).

12122010021 is a wasteful number, since it uses less digits than its factorization.

12122010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47994 (or 47983 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12122010021 its reverse (12001022121), we get a palindrome (24123032142).

The spelling of 12122010021 in words is "twelve billion, one hundred twenty-two million, ten thousand, twenty-one".