1121212111101 has 4 divisors (see below), whose sum is σ = 1494949481472. Its totient is φ = 747474740732.

The previous prime is 1121212111093. The next prime is 1121212111109. The reversal of 1121212111101 is 1011112121211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1121212111093) and next prime (1121212111109).

It is a cyclic number.

It is not a de Polignac number, because 1121212111101 - 2³ = 1121212111093 is a prime.

It is a super-2 number, since 2×1121212111101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121212111109) 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, 186868685181 + ... + 186868685186.

It is an arithmetic number, because the mean of its divisors is an integer number (373737370368).

Almost surely, 2^{1121212111101} is an apocalyptic number.

It is an amenable number.

1121212111101 is a deficient number, since it is larger than the sum of its proper divisors (373737370371).

1121212111101 is an equidigital number, since it uses as much as digits as its factorization.

1121212111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373737370370.

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

Adding to 1121212111101 its reverse (1011112121211), we get a palindrome (2132324232312).

It can be divided in two parts, 112121 and 2111101, that added together give a palindrome (2223222).

The spelling of 1121212111101 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, one hundred one".