121011221343 has 4 divisors (see below), whose sum is σ = 161348295128. Its totient is φ = 80674147560.

The previous prime is 121011221341. The next prime is 121011221351. The reversal of 121011221343 is 343122110121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121011221343 - 2¹ = 121011221341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011221341) 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, 20168536888 + ... + 20168536893.

It is an arithmetic number, because the mean of its divisors is an integer number (40337073782).

Almost surely, 2^121011221343 is an apocalyptic number.

121011221343 is a deficient number, since it is larger than the sum of its proper divisors (40337073785).

121011221343 is an equidigital number, since it uses as much as digits as its factorization.

121011221343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40337073784.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121011221343 its reverse (343122110121), we get a palindrome (464133331464).

The spelling of 121011221343 in words is "one hundred twenty-one billion, eleven million, two hundred twenty-one thousand, three hundred forty-three".