1111211212101 has 16 divisors (see below), whose sum is σ = 1531495580160. Its totient is φ = 715932365760.

The previous prime is 1111211212091. The next prime is 1111211212151. The reversal of 1111211212101 is 1012121121111.

It is not a de Polignac number, because 1111211212101 - 2⁷ = 1111211211973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111211212151) 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, 8082246 + ... + 8218583.

It is an arithmetic number, because the mean of its divisors is an integer number (95718473760).

Almost surely, 2^{1111211212101} is an apocalyptic number.

It is an amenable number.

1111211212101 is a deficient number, since it is larger than the sum of its proper divisors (420284368059).

1111211212101 is a wasteful number, since it uses less digits than its factorization.

1111211212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16301596.

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

Adding to 1111211212101 its reverse (1012121121111), we get a palindrome (2123332333212).

The spelling of 1111211212101 in words is "one trillion, one hundred eleven billion, two hundred eleven million, two hundred twelve thousand, one hundred one".