2135205063421 has 16 divisors (see below), whose sum is σ = 2220190750720. Its totient is φ = 2051255709360.

The previous prime is 2135205063377. The next prime is 2135205063479. The reversal of 2135205063421 is 1243605025312.

It is a cyclic number.

It is not a de Polignac number, because 2135205063421 - 2¹³ = 2135205055229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135205063491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4094566 + ... + 4586488.

It is an arithmetic number, because the mean of its divisors is an integer number (138761921920).

Almost surely, 2^{2135205063421} is an apocalyptic number.

It is an amenable number.

2135205063421 is a deficient number, since it is larger than the sum of its proper divisors (84985687299).

2135205063421 is a wasteful number, since it uses less digits than its factorization.

2135205063421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492976.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 2135205063421 in words is "two trillion, one hundred thirty-five billion, two hundred five million, sixty-three thousand, four hundred twenty-one".