1111212120201 has 16 divisors (see below), whose sum is σ = 1497096919680. Its totient is φ = 733088482560.

The previous prime is 1111212120197. The next prime is 1111212120209. The reversal of 1111212120201 is 1020212121111.

It is a happy number.

It is not a de Polignac number, because 1111212120201 - 2² = 1111212120197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1111212120209) 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, 2383486 + ... + 2811303.

It is an arithmetic number, because the mean of its divisors is an integer number (93568557480).

Almost surely, 2^{1111212120201} is an apocalyptic number.

It is an amenable number.

1111212120201 is a deficient number, since it is larger than the sum of its proper divisors (385884799479).

1111212120201 is a wasteful number, since it uses less digits than its factorization.

1111212120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195536.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111212120201 its reverse (1020212121111), we get a palindrome (2131424241312).

It can be divided in two parts, 111121 and 2120201, that added together give a palindrome (2231322).

The spelling of 1111212120201 in words is "one trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty thousand, two hundred one".