701601000020021 has 16 divisors (see below), whose sum is σ = 718654746448320. Its totient is φ = 684580928814720.

The previous prime is 701601000020009. The next prime is 701601000020069. The reversal of 701601000020021 is 120020000106107.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-701601000020021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 701601000019975 and 701601000020002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (701601000020321) 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, 381102281 + ... + 382938833.

It is an arithmetic number, because the mean of its divisors is an integer number (44915921653020).

Almost surely, 2^{701601000020021} is an apocalyptic number.

It is an amenable number.

701601000020021 is a deficient number, since it is larger than the sum of its proper divisors (17053746428299).

701601000020021 is a wasteful number, since it uses less digits than its factorization.

701601000020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845716.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 701601000020021 its reverse (120020000106107), we get a palindrome (821621000126128).

The spelling of 701601000020021 in words is "seven hundred one trillion, six hundred one billion, twenty thousand, twenty-one".