5601610100021 has 4 divisors (see below), whose sum is σ = 6032503184652. Its totient is φ = 5170717015392.

The previous prime is 5601610100017. The next prime is 5601610100027. The reversal of 5601610100021 is 1200010161065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3288016997521 + 2313593102500 = 1813289^2 + 1521050^2 .

It is a cyclic number.

It is not a de Polignac number, because 5601610100021 - 2² = 5601610100017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5601610100021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5601610100027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215446542296 + ... + 215446542321.

It is an arithmetic number, because the mean of its divisors is an integer number (1508125796163).

Almost surely, 2^{5601610100021} is an apocalyptic number.

It is an amenable number.

5601610100021 is a deficient number, since it is larger than the sum of its proper divisors (430893084631).

5601610100021 is a wasteful number, since it uses less digits than its factorization.

5601610100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430893084630.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 5601610100021 its reverse (1200010161065), we get a palindrome (6801620261086).

The spelling of 5601610100021 in words is "five trillion, six hundred one billion, six hundred ten million, one hundred thousand, twenty-one".