2135023021 has 8 divisors (see below), whose sum is σ = 2147558400. Its totient is φ = 2122502160.

The previous prime is 2135023019. The next prime is 2135023049. The reversal of 2135023021 is 1203205312.

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 2135023021 - 2¹ = 2135023019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2135023021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135026021) 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, 453960 + ... + 458638.

It is an arithmetic number, because the mean of its divisors is an integer number (268444800).

Almost surely, 2^2135023021 is an apocalyptic number.

It is an amenable number.

2135023021 is a deficient number, since it is larger than the sum of its proper divisors (12535379).

2135023021 is a wasteful number, since it uses less digits than its factorization.

2135023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7259.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2135023021 is about 46206.3093202649. The cubic root of 2135023021 is about 1287.6589596803.

Adding to 2135023021 its reverse (1203205312), we get a palindrome (3338228333).

The spelling of 2135023021 in words is "two billion, one hundred thirty-five million, twenty-three thousand, twenty-one".