11011211201 has 4 divisors (see below), whose sum is σ = 11072046804. Its totient is φ = 10950375600.

The previous prime is 11011211131. The next prime is 11011211213. The reversal of 11011211201 is 10211211011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10211211011 = 643 ⋅15880577.

It can be written as a sum of positive squares in 2 ways, for example, as 5535211201 + 5476000000 = 74399^2 + 74000^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011211201 - 2¹⁸ = 11010949057 is a prime.

It is a super-2 number, since 2×11011211201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11011211251) 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, 30417530 + ... + 30417891.

It is an arithmetic number, because the mean of its divisors is an integer number (2768011701).

Almost surely, 2^11011211201 is an apocalyptic number.

It is an amenable number.

11011211201 is a deficient number, since it is larger than the sum of its proper divisors (60835603).

11011211201 is an equidigital number, since it uses as much as digits as its factorization.

11011211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60835602.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11011211201 its reverse (10211211011), we get a palindrome (21222422212).

The spelling of 11011211201 in words is "eleven billion, eleven million, two hundred eleven thousand, two hundred one".