121240340101 has 4 divisors (see below), whose sum is σ = 121288018752. Its totient is φ = 121192661452.

The previous prime is 121240340063. The next prime is 121240340131. The reversal of 121240340101 is 101043042121.

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 a cyclic number.

It is not a de Polignac number, because 121240340101 - 2¹¹ = 121240338053 is a prime.

It is a super-2 number, since 2×121240340101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121240340131) 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, 23835511 + ... + 23840596.

It is an arithmetic number, because the mean of its divisors is an integer number (30322004688).

Almost surely, 2^121240340101 is an apocalyptic number.

It is an amenable number.

121240340101 is a deficient number, since it is larger than the sum of its proper divisors (47678651).

121240340101 is an equidigital number, since it uses as much as digits as its factorization.

121240340101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47678650.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121240340101 its reverse (101043042121), we get a palindrome (222283382222).

The spelling of 121240340101 in words is "one hundred twenty-one billion, two hundred forty million, three hundred forty thousand, one hundred one".