2121357529 has 8 divisors (see below), whose sum is σ = 2254085280. Its totient is φ = 1989512256.

The previous prime is 2121357527. The next prime is 2121357541. The reversal of 2121357529 is 9257531212.

It is a happy number.

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 2121357529 - 2¹ = 2121357527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121357527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215659 + ... + 225280.

It is an arithmetic number, because the mean of its divisors is an integer number (281760660).

Almost surely, 2^2121357529 is an apocalyptic number.

It is an amenable number.

2121357529 is a deficient number, since it is larger than the sum of its proper divisors (132727751).

2121357529 is a wasteful number, since it uses less digits than its factorization.

2121357529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441239.

The product of its digits is 37800, while the sum is 37.

The square root of 2121357529 is about 46058.1971965903. The cubic root of 2121357529 is about 1284.9058012069.

The spelling of 2121357529 in words is "two billion, one hundred twenty-one million, three hundred fifty-seven thousand, five hundred twenty-nine".