2121539357 has 8 divisors (see below), whose sum is σ = 2430219456. Its totient is φ = 1814260032.

The previous prime is 2121539351. The next prime is 2121539363. The reversal of 2121539357 is 7539351212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2121539351) and next prime (2121539363).

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

It is a cyclic number.

It is not a de Polignac number, because 2121539357 - 2¹⁰ = 2121538333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121539357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121539351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346943 + ... + 353004.

It is an arithmetic number, because the mean of its divisors is an integer number (303777432).

Almost surely, 2^2121539357 is an apocalyptic number.

It is an amenable number.

2121539357 is a deficient number, since it is larger than the sum of its proper divisors (308680099).

2121539357 is an equidigital number, since it uses as much as digits as its factorization.

2121539357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700387.

The product of its digits is 56700, while the sum is 38.

The square root of 2121539357 is about 46060.1710483146. The cubic root of 2121539357 is about 1284.9425112184.

The spelling of 2121539357 in words is "two billion, one hundred twenty-one million, five hundred thirty-nine thousand, three hundred fifty-seven".