2121640236411 has 8 divisors (see below), whose sum is σ = 2834477614080. Its totient is φ = 1411614841512.

The previous prime is 2121640236409. The next prime is 2121640236431. The reversal of 2121640236411 is 1146320461212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121640236411 - 2¹ = 2121640236409 is a prime.

It is a super-3 number, since 3×2121640236411³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121640236431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702993931 + ... + 702996948.

It is an arithmetic number, because the mean of its divisors is an integer number (354309701760).

Almost surely, 2^{2121640236411} is an apocalyptic number.

2121640236411 is a deficient number, since it is larger than the sum of its proper divisors (712837377669).

2121640236411 is a wasteful number, since it uses less digits than its factorization.

2121640236411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405991385.

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 2121640236411 its reverse (1146320461212), we get a palindrome (3267960697623).

The spelling of 2121640236411 in words is "two trillion, one hundred twenty-one billion, six hundred forty million, two hundred thirty-six thousand, four hundred eleven".