121343121 has 6 divisors (see below), whose sum is σ = 175273410. Its totient is φ = 80895408.

The previous prime is 121343113. The next prime is 121343137.

121343121 is a `hidden beast` number, since 1 + 213 + 431 + 21 = 666.

121343121 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 71216721 + 50126400 = 8439^2 + 7080^2 .

It is not a de Polignac number, because 121343121 - 2³ = 121343113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121343094 and 121343103.

It is not an unprimeable number, because it can be changed into a prime (121343111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6741276 + ... + 6741293.

It is an arithmetic number, because the mean of its divisors is an integer number (29212235).

Almost surely, 2^121343121 is an apocalyptic number.

It is an amenable number.

121343121 is a deficient number, since it is larger than the sum of its proper divisors (53930289).

121343121 is a wasteful number, since it uses less digits than its factorization.

121343121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13482575 (or 13482572 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121343121 is about 11015.5853680138. The cubic root of 121343121 is about 495.0758255437.

The spelling of 121343121 in words is "one hundred twenty-one million, three hundred forty-three thousand, one hundred twenty-one".