121345445351503 has 12 divisors (see below), whose sum is σ = 121749855903504. Its totient is φ = 120942372908000.

The previous prime is 121345445351479. The next prime is 121345445351509. The reversal of 121345445351503 is 305153544543121.

It is not a de Polignac number, because 121345445351503 - 2⁹ = 121345445350991 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 (121345445351509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 981753075 + ... + 981876667.

It is an arithmetic number, because the mean of its divisors is an integer number (10145821325292).

Almost surely, 2^{121345445351503} is an apocalyptic number.

121345445351503 is a deficient number, since it is larger than the sum of its proper divisors (404410552001).

121345445351503 is an equidigital number, since it uses as much as digits as its factorization.

121345445351503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134366 (or 134055 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 46.

Adding to 121345445351503 its reverse (305153544543121), we get a palindrome (426498989894624).

The spelling of 121345445351503 in words is "one hundred twenty-one trillion, three hundred forty-five billion, four hundred forty-five million, three hundred fifty-one thousand, five hundred three".