121343013021 has 4 divisors (see below), whose sum is σ = 161790684032. Its totient is φ = 80895342012.

The previous prime is 121343013017. The next prime is 121343013023. The reversal of 121343013021 is 120310343121.

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 121343013021 - 2² = 121343013017 is a prime.

It is a super-3 number, since 3×121343013021³ (a number of 34 digits) contains 333 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 (121343013023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20223835501 + ... + 20223835506.

It is an arithmetic number, because the mean of its divisors is an integer number (40447671008).

Almost surely, 2^121343013021 is an apocalyptic number.

It is an amenable number.

121343013021 is a deficient number, since it is larger than the sum of its proper divisors (40447671011).

121343013021 is an equidigital number, since it uses as much as digits as its factorization.

121343013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40447671010.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121343013021 its reverse (120310343121), we get a palindrome (241653356142).

The spelling of 121343013021 in words is "one hundred twenty-one billion, three hundred forty-three million, thirteen thousand, twenty-one".