121277045643 has 32 divisors (see below), whose sum is σ = 178918888512. Its totient is φ = 72595353600.

The previous prime is 121277045623. The next prime is 121277045647. The reversal of 121277045643 is 346540772121.

It is not a de Polignac number, because 121277045643 - 2²² = 121272851339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121277045595 and 121277045604.

It is not an unprimeable number, because it can be changed into a prime (121277045647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426333 + ... + 651393.

It is an arithmetic number, because the mean of its divisors is an integer number (5591215266).

Almost surely, 2^121277045643 is an apocalyptic number.

121277045643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121277045643 is a deficient number, since it is larger than the sum of its proper divisors (57641842869).

121277045643 is a wasteful number, since it uses less digits than its factorization.

121277045643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225455.

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 121277045643 in words is "one hundred twenty-one billion, two hundred seventy-seven million, forty-five thousand, six hundred forty-three".