121111102221101 has 4 divisors (see below), whose sum is σ = 121121103975900. Its totient is φ = 121101100466304.

The previous prime is 121111102221073. The next prime is 121111102221119. The reversal of 121111102221101 is 101122201111121.

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 64462448380201 + 56648653840900 = 8028851^2 + 7526530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121111102221101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121111102221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111102221701) 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, 5000859236 + ... + 5000883453.

It is an arithmetic number, because the mean of its divisors is an integer number (30280275993975).

Almost surely, 2^{121111102221101} is an apocalyptic number.

It is an amenable number.

121111102221101 is a deficient number, since it is larger than the sum of its proper divisors (10001754799).

121111102221101 is a wasteful number, since it uses less digits than its factorization.

121111102221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001754798.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121111102221101 its reverse (101122201111121), we get a palindrome (222233303332222).

The spelling of 121111102221101 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred two million, two hundred twenty-one thousand, one hundred one".