201960021 has 8 divisors (see below), whose sum is σ = 269359264. Its totient is φ = 134600400.

The previous prime is 201960013. The next prime is 201960029. The reversal of 201960021 is 120069102.

It is an interprime number because it is at equal distance from previous prime (201960013) and next prime (201960029).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201960021 - 2³ = 201960013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201960021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201960029) 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, 5346 + ... + 20796.

It is an arithmetic number, because the mean of its divisors is an integer number (33669908).

Almost surely, 2^201960021 is an apocalyptic number.

It is an amenable number.

201960021 is a deficient number, since it is larger than the sum of its proper divisors (67399243).

201960021 is a wasteful number, since it uses less digits than its factorization.

201960021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19811.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 201960021 is about 14211.2638776430. The cubic root of 201960021 is about 586.7077194857.

The spelling of 201960021 in words is "two hundred one million, nine hundred sixty thousand, twenty-one".