1988068980121 has 27 divisors (see below), whose sum is σ = 2346510107487. Its totient is φ = 1679466097680.

The previous prime is 1988068980077. The next prime is 1988068980143. The reversal of 1988068980121 is 1210898608891.

The square root of 1988068980121 is 1409989.

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., 68081855625 + 1919987124496 = 260925^2 + 1385636^2 .

It is not a de Polignac number, because 1988068980121 - 2¹⁵ = 1988068947353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1988068980121.

It is not an unprimeable number, because it can be changed into a prime (1988066980121) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 700763115 + ... + 700765951.

Almost surely, 2^{1988068980121} is an apocalyptic number.

1988068980121 is the 1409989-th square number.

1988068980121 is the 704995-th centered octagonal number.

It is an amenable number.

1988068980121 is a deficient number, since it is larger than the sum of its proper divisors (358441127366).

1988068980121 is an frugal number, since it uses more digits than its factorization.

1988068980121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830 (or 2915 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 61.

The spelling of 1988068980121 in words is "one trillion, nine hundred eighty-eight billion, sixty-eight million, nine hundred eighty thousand, one hundred twenty-one".