2127121040 has 80 divisors (see below), whose sum is σ = 5443151616. Its totient is φ = 766617600.

The previous prime is 2127121013. The next prime is 2127121043. The reversal of 2127121040 is 401217212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2127121043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88745 + ... + 110135.

Almost surely, 2^2127121040 is an apocalyptic number.

2127121040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2127121040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721575808).

2127121040 is an abundant number, since it is smaller than the sum of its proper divisors (3316030576).

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

2127121040 is a wasteful number, since it uses less digits than its factorization.

2127121040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21528 (or 21522 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 2127121040 is about 46120.7224574811. The cubic root of 2127121040 is about 1286.0684014129.

Adding to 2127121040 its reverse (401217212), we get a palindrome (2528338252).

The spelling of 2127121040 in words is "two billion, one hundred twenty-seven million, one hundred twenty-one thousand, forty".