121423201055 has 32 divisors (see below), whose sum is σ = 159107155200. Its totient is φ = 88417285632.

The previous prime is 121423201037. The next prime is 121423201087. The reversal of 121423201055 is 550102324121.

It is not a de Polignac number, because 121423201055 - 2²⁰ = 121422152479 is a prime.

It is a super-2 number, since 2×121423201055² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4077761 + ... + 4107429.

It is an arithmetic number, because the mean of its divisors is an integer number (4972098600).

Almost surely, 2^121423201055 is an apocalyptic number.

121423201055 is a deficient number, since it is larger than the sum of its proper divisors (37683954145).

121423201055 is a wasteful number, since it uses less digits than its factorization.

121423201055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30563.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 121423201055 its reverse (550102324121), we get a palindrome (671525525176).

The spelling of 121423201055 in words is "one hundred twenty-one billion, four hundred twenty-three million, two hundred one thousand, fifty-five".