11111211021201 has 16 divisors (see below), whose sum is σ = 15569197431744. Its totient is φ = 7039661033664.

The previous prime is 11111211021199. The next prime is 11111211021221. The reversal of 11111211021201 is 10212011211111.

It is not a de Polignac number, because 11111211021201 - 2¹ = 11111211021199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111211021221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1163960346 + ... + 1163969891.

It is an arithmetic number, because the mean of its divisors is an integer number (973074839484).

Almost surely, 2^{11111211021201} is an apocalyptic number.

It is an amenable number.

11111211021201 is a deficient number, since it is larger than the sum of its proper divisors (4457986410543).

11111211021201 is a wasteful number, since it uses less digits than its factorization.

11111211021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327930320.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11111211021201 its reverse (10212011211111), we get a palindrome (21323222232312).

The spelling of 11111211021201 in words is "eleven trillion, one hundred eleven billion, two hundred eleven million, twenty-one thousand, two hundred one".