121212013343 has 4 divisors (see below), whose sum is σ = 121218061800. Its totient is φ = 121205964888.

The previous prime is 121212013339. The next prime is 121212013381. The reversal of 121212013343 is 343310212121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343310212121 = 271 ⋅1266827351.

It is a cyclic number.

It is not a de Polignac number, because 121212013343 - 2² = 121212013339 is a prime.

It is a super-2 number, since 2×121212013343² (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 (121212013303) 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, 2994068 + ... + 3034281.

It is an arithmetic number, because the mean of its divisors is an integer number (30304515450).

Almost surely, 2^121212013343 is an apocalyptic number.

121212013343 is a deficient number, since it is larger than the sum of its proper divisors (6048457).

121212013343 is an equidigital number, since it uses as much as digits as its factorization.

121212013343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6048456.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 121212013343 its reverse (343310212121), we get a palindrome (464522225464).

The spelling of 121212013343 in words is "one hundred twenty-one billion, two hundred twelve million, thirteen thousand, three hundred forty-three".