121213403043 has 16 divisors (see below), whose sum is σ = 172431110016. Its totient is φ = 75474888320.

The previous prime is 121213403041. The next prime is 121213403099. The reversal of 121213403043 is 340304312121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121213403043 - 2¹ = 121213403041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121213403041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9064821 + ... + 9078182.

It is an arithmetic number, because the mean of its divisors is an integer number (10776944376).

Almost surely, 2^121213403043 is an apocalyptic number.

121213403043 is a deficient number, since it is larger than the sum of its proper divisors (51217706973).

121213403043 is a wasteful number, since it uses less digits than its factorization.

121213403043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18143154.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 121213403043 its reverse (340304312121), we get a palindrome (461517715164).

The spelling of 121213403043 in words is "one hundred twenty-one billion, two hundred thirteen million, four hundred three thousand, forty-three".