201010121211001 has 4 divisors (see below), whose sum is σ = 201069927855604. Its totient is φ = 200950314566400.

The previous prime is 201010121210999. The next prime is 201010121211037. The reversal of 201010121211001 is 100112121010102.

It is a happy number.

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 101826747173776 + 99183374037225 = 10090924^2 + 9959085^2 .

It is a cyclic number.

It is not a de Polignac number, because 201010121211001 - 2¹ = 201010121210999 is a prime.

It is a super-2 number, since 2×201010121211001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201010121211401) 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, 29903317260 + ... + 29903323981.

It is an arithmetic number, because the mean of its divisors is an integer number (50267481963901).

Almost surely, 2^{201010121211001} is an apocalyptic number.

It is an amenable number.

201010121211001 is a deficient number, since it is larger than the sum of its proper divisors (59806644603).

201010121211001 is an equidigital number, since it uses as much as digits as its factorization.

201010121211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59806644602.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201010121211001 its reverse (100112121010102), we get a palindrome (301122242221103).

The spelling of 201010121211001 in words is "two hundred one trillion, ten billion, one hundred twenty-one million, two hundred eleven thousand, one".