201011210323021 has 6 divisors (see below), whose sum is σ = 233829367110510. Its totient is φ = 172295323133976.

The previous prime is 201011210322943. The next prime is 201011210323031. The reversal of 201011210323021 is 120323012110102.

It can be written as a sum of positive squares in only one way, i.e., 189182694096900 + 11828516226121 = 13754370^2 + 3439261^2 .

It is not a de Polignac number, because 201011210323021 - 2²⁹ = 201010673452109 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 201011210323021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011210323031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2051134799166 + ... + 2051134799263.

It is an arithmetic number, because the mean of its divisors is an integer number (38971561185085).

Almost surely, 2^{201011210323021} is an apocalyptic number.

It is an amenable number.

201011210323021 is a deficient number, since it is larger than the sum of its proper divisors (32818156787489).

201011210323021 is an equidigital number, since it uses as much as digits as its factorization.

201011210323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4102269598443 (or 4102269598436 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 201011210323021 its reverse (120323012110102), we get a palindrome (321334222433123).

The spelling of 201011210323021 in words is "two hundred one trillion, eleven billion, two hundred ten million, three hundred twenty-three thousand, twenty-one".