2135541021 has 8 divisors (see below), whose sum is σ = 2907970944. Its totient is φ = 1393402560.

The previous prime is 2135541019. The next prime is 2135541061. The reversal of 2135541021 is 1201455312.

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 2135541021 - 2¹ = 2135541019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2135540982 and 2135541000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135541011) 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, 7572700 + ... + 7572981.

It is an arithmetic number, because the mean of its divisors is an integer number (363496368).

Almost surely, 2^2135541021 is an apocalyptic number.

It is an amenable number.

2135541021 is a deficient number, since it is larger than the sum of its proper divisors (772429923).

2135541021 is a wasteful number, since it uses less digits than its factorization.

2135541021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15145731.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2135541021 is about 46211.9142754333. The cubic root of 2135541021 is about 1287.7630886754.

Adding to 2135541021 its reverse (1201455312), we get a palindrome (3336996333).

The spelling of 2135541021 in words is "two billion, one hundred thirty-five million, five hundred forty-one thousand, twenty-one".