2120126660 has 24 divisors (see below), whose sum is σ = 4645843776. Its totient is φ = 811178720.

The previous prime is 2120126641. The next prime is 2120126681. The reversal of 2120126660 is 666210212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2304026 + ... + 2304945.

It is an arithmetic number, because the mean of its divisors is an integer number (193576824).

Almost surely, 2^2120126660 is an apocalyptic number.

2120126660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120126660 is an abundant number, since it is smaller than the sum of its proper divisors (2525717116).

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

2120126660 is a wasteful number, since it uses less digits than its factorization.

2120126660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609003 (or 4609001 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2120126660 is about 46044.8331520487. The cubic root of 2120126660 is about 1284.6572407636.

Adding to 2120126660 its reverse (666210212), we get a palindrome (2786336872).

The spelling of 2120126660 in words is "two billion, one hundred twenty million, one hundred twenty-six thousand, six hundred sixty".