121311101 has 4 divisors (see below), whose sum is σ = 121454172. Its totient is φ = 121168032.

The previous prime is 121311059. The next prime is 121311103. The reversal of 121311101 is 101113121.

It is a happy number.

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 66031876 + 55279225 = 8126^2 + 7435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121311101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311103) 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, 70256 + ... + 71961.

It is an arithmetic number, because the mean of its divisors is an integer number (30363543).

Almost surely, 2^121311101 is an apocalyptic number.

It is an amenable number.

121311101 is a deficient number, since it is larger than the sum of its proper divisors (143071).

121311101 is an equidigital number, since it uses as much as digits as its factorization.

121311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143070.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 121311101 is about 11014.1318768208. The cubic root of 121311101 is about 495.0322748741.

Adding to 121311101 its reverse (101113121), we get a palindrome (222424222).

The spelling of 121311101 in words is "one hundred twenty-one million, three hundred eleven thousand, one hundred one".