121400044545 has 32 divisors (see below), whose sum is σ = 214835185152. Its totient is φ = 58150870272.

The previous prime is 121400044541. The next prime is 121400044559. The reversal of 121400044545 is 545440004121.

It is not a de Polignac number, because 121400044545 - 2² = 121400044541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121400044541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8405817 + ... + 8420246.

It is an arithmetic number, because the mean of its divisors is an integer number (6713599536).

Almost surely, 2^121400044545 is an apocalyptic number.

121400044545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121400044545 is a deficient number, since it is larger than the sum of its proper divisors (93435140607).

121400044545 is a wasteful number, since it uses less digits than its factorization.

121400044545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16826121.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 121400044545 its reverse (545440004121), we get a palindrome (666840048666).

The spelling of 121400044545 in words is "one hundred twenty-one billion, four hundred million, forty-four thousand, five hundred forty-five".