121243342121 has 4 divisors (see below), whose sum is σ = 132265464144. Its totient is φ = 110221220100.

The previous prime is 121243342097. The next prime is 121243342123.

It is a happy number.

121243342121 is nontrivially palindromic in base 10.

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 a de Polignac number, because none of the positive numbers 2^k-121243342121 is a prime.

It is a super-3 number, since 3×121243342121³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121243342123) 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, 5511060995 + ... + 5511061016.

It is an arithmetic number, because the mean of its divisors is an integer number (33066366036).

Almost surely, 2^121243342121 is an apocalyptic number.

121243342121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121243342121 is a deficient number, since it is larger than the sum of its proper divisors (11022122023).

121243342121 is a wasteful number, since it uses less digits than its factorization.

121243342121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11022122022.

The product of its digits is 2304, while the sum is 26.

It can be divided in two parts, 121243 and 342121, that added together give a palindrome (463364).

The spelling of 121243342121 in words is "one hundred twenty-one billion, two hundred forty-three million, three hundred forty-two thousand, one hundred twenty-one".