2121071340 has 24 divisors (see below), whose sum is σ = 5938999920. Its totient is φ = 565619008.

The previous prime is 2121071333. The next prime is 2121071357. The reversal of 2121071340 is 431701212.

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, 17675535 + ... + 17675654.

It is an arithmetic number, because the mean of its divisors is an integer number (247458330).

Almost surely, 2^2121071340 is an apocalyptic number.

2121071340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121071340 is an abundant number, since it is smaller than the sum of its proper divisors (3817928580).

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

2121071340 is a wasteful number, since it uses less digits than its factorization.

2121071340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35351201 (or 35351199 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 2121071340 is about 46055.0902724118. The cubic root of 2121071340 is about 1284.8480170697.

Adding to 2121071340 its reverse (431701212), we get a palindrome (2552772552).

The spelling of 2121071340 in words is "two billion, one hundred twenty-one million, seventy-one thousand, three hundred forty".