121231101 has 4 divisors (see below), whose sum is σ = 161641472. Its totient is φ = 80820732.

The previous prime is 121231093. The next prime is 121231133. The reversal of 121231101 is 101132121.

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 not a de Polignac number, because 121231101 - 2³ = 121231093 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 (121231181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20205181 + ... + 20205186.

It is an arithmetic number, because the mean of its divisors is an integer number (40410368).

Almost surely, 2^121231101 is an apocalyptic number.

It is an amenable number.

121231101 is a deficient number, since it is larger than the sum of its proper divisors (40410371).

121231101 is an equidigital number, since it uses as much as digits as its factorization.

121231101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40410370.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 121231101 is about 11010.4995799464. The cubic root of 121231101 is about 494.9234327035.

Adding to 121231101 its reverse (101132121), we get a palindrome (222363222).

The spelling of 121231101 in words is "one hundred twenty-one million, two hundred thirty-one thousand, one hundred one".