121420232455 has 16 divisors (see below), whose sum is σ = 154283379264. Its totient is φ = 91417397760.

The previous prime is 121420232441. The next prime is 121420232467. The reversal of 121420232455 is 554232024121.

It is a happy number.

It is not a de Polignac number, because 121420232455 - 2¹⁹ = 121419708167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2733070 + ... + 2777140.

It is an arithmetic number, because the mean of its divisors is an integer number (9642711204).

Almost surely, 2^121420232455 is an apocalyptic number.

121420232455 is a deficient number, since it is larger than the sum of its proper divisors (32863146809).

121420232455 is a wasteful number, since it uses less digits than its factorization.

121420232455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76506.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 121420232455 its reverse (554232024121), we get a palindrome (675652256576).

The spelling of 121420232455 in words is "one hundred twenty-one billion, four hundred twenty million, two hundred thirty-two thousand, four hundred fifty-five".