4198446078121 has 9 divisors (see below), whose sum is σ = 4270935263511. Its totient is φ = 4127167132464.

The previous prime is 4198446078119. The next prime is 4198446078139. The reversal of 4198446078121 is 1218706448914.

The square root of 4198446078121 is 2049011.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 69584636521 + 4128861441600 = 263789^2 + 2031960^2 .

It is not a de Polignac number, because 4198446078121 - 2¹ = 4198446078119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4198446078181) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 120874285 + ... + 120909013.

Almost surely, 2^{4198446078121} is an apocalyptic number.

4198446078121 is the 2049011-st square number.

4198446078121 is the 1024506-th centered octagonal number.

It is an amenable number.

4198446078121 is a deficient number, since it is larger than the sum of its proper divisors (72489185390).

4198446078121 is an frugal number, since it uses more digits than its factorization.

4198446078121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69576 (or 34788 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 4198446078121 in words is "four trillion, one hundred ninety-eight billion, four hundred forty-six million, seventy-eight thousand, one hundred twenty-one".