2121446620 has 24 divisors (see below), whose sum is σ = 4456577664. Its totient is φ = 848285376.

The previous prime is 2121446597. The next prime is 2121446629. The reversal of 2121446620 is 266441212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121446629) 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, 46594 + ... + 80086.

It is an arithmetic number, because the mean of its divisors is an integer number (185690736).

Almost surely, 2^2121446620 is an apocalyptic number.

2121446620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121446620 is an abundant number, since it is smaller than the sum of its proper divisors (2335131044).

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

2121446620 is a wasteful number, since it uses less digits than its factorization.

2121446620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36669 (or 36667 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2121446620 is about 46059.1643432662. The cubic root of 2121446620 is about 1284.9237884217.

Adding to 2121446620 its reverse (266441212), we get a palindrome (2387887832).

The spelling of 2121446620 in words is "two billion, one hundred twenty-one million, four hundred forty-six thousand, six hundred twenty".