201040360621 has 4 divisors (see below), whose sum is σ = 201229843644. Its totient is φ = 200850877600.

The previous prime is 201040360597. The next prime is 201040360627. The reversal of 201040360621 is 126063040102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126063040102 = 2 ⋅63031520051.

It can be written as a sum of positive squares in 2 ways, for example, as 48580568100 + 152459792521 = 220410^2 + 390461^2 .

It is a cyclic number.

It is not a de Polignac number, because 201040360621 - 2²¹ = 201038263469 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 (201040360627) 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, 94739920 + ... + 94742041.

It is an arithmetic number, because the mean of its divisors is an integer number (50307460911).

Almost surely, 2^201040360621 is an apocalyptic number.

It is an amenable number.

201040360621 is a deficient number, since it is larger than the sum of its proper divisors (189483023).

201040360621 is a wasteful number, since it uses less digits than its factorization.

201040360621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189483022.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 201040360621 in words is "two hundred one billion, forty million, three hundred sixty thousand, six hundred twenty-one".