121400043444 has 18 divisors (see below), whose sum is σ = 306872332130. Its totient is φ = 40466681136.

The previous prime is 121400043431. The next prime is 121400043461. The reversal of 121400043444 is 444340004121.

121400043444 is a `hidden beast` number, since 1 + 214 + 0 + 0 + 0 + 4 + 3 + 444 = 666.

It can be written as a sum of positive squares in only one way, i.e., 118706433444 + 2693610000 = 344538^2 + 51900^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×121400043444² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1686111679 + ... + 1686111750.

Almost surely, 2^121400043444 is an apocalyptic number.

It is an amenable number.

121400043444 is an abundant number, since it is smaller than the sum of its proper divisors (185472288686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121400043444 is a wasteful number, since it uses less digits than its factorization.

121400043444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372223439 (or 3372223434 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 121400043444 its reverse (444340004121), we get a palindrome (565740047565).

The spelling of 121400043444 in words is "one hundred twenty-one billion, four hundred million, forty-three thousand, four hundred forty-four".