11231020201 has 4 divisors (see below), whose sum is σ = 11231854804. Its totient is φ = 11230185600.

The previous prime is 11231020181. The next prime is 11231020259. The reversal of 11231020201 is 10202013211.

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 6983109225 + 4247910976 = 83565^2 + 65176^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231020201 - 2¹⁵ = 11230987433 is a prime.

It is a super-2 number, since 2×11231020201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11231020291) 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, 396780 + ... + 424141.

It is an arithmetic number, because the mean of its divisors is an integer number (2807963701).

Almost surely, 2^11231020201 is an apocalyptic number.

It is an amenable number.

11231020201 is a deficient number, since it is larger than the sum of its proper divisors (834603).

11231020201 is an equidigital number, since it uses as much as digits as its factorization.

11231020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834602.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11231020201 its reverse (10202013211), we get a palindrome (21433033412).

The spelling of 11231020201 in words is "eleven billion, two hundred thirty-one million, twenty thousand, two hundred one".