2101520140 has 12 divisors (see below), whose sum is σ = 4413192336. Its totient is φ = 840608048.

The previous prime is 2101520129. The next prime is 2101520147. The reversal of 2101520140 is 410251012.

It is not an unprimeable number, because it can be changed into a prime (2101520147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52537984 + ... + 52538023.

It is an arithmetic number, because the mean of its divisors is an integer number (367766028).

Almost surely, 2^2101520140 is an apocalyptic number.

2101520140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101520140 is an abundant number, since it is smaller than the sum of its proper divisors (2311672196).

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

2101520140 is a wasteful number, since it uses less digits than its factorization.

2101520140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105076016 (or 105076014 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2101520140 is about 45842.3400362591. The cubic root of 2101520140 is about 1280.8880840489. Note that the first 3 decimals are identical.

Adding to 2101520140 its reverse (410251012), we get a palindrome (2511771152).

The spelling of 2101520140 in words is "two billion, one hundred one million, five hundred twenty thousand, one hundred forty".