2028519396121 has 3 divisors (see below), whose sum is σ = 2028520820383. Its totient is φ = 2028517971860.

The previous prime is 2028519396089. The next prime is 2028519396131. The reversal of 2028519396121 is 1216939158202.

The square root of 2028519396121 is 1424261.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1490203706121 + 538315690000 = 1220739^2 + 733700^2 .

It is not a de Polignac number, because 2028519396121 - 2⁵ = 2028519396089 is a prime.

It is a super-2 number, since 2×2028519396121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028519396131) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 712131 + ... + 2136391.

Almost surely, 2^{2028519396121} is an apocalyptic number.

2028519396121 is the 1424261-st square number.

2028519396121 is the 712131-st centered octagonal number.

It is an amenable number.

2028519396121 is a deficient number, since it is larger than the sum of its proper divisors (1424262).

2028519396121 is an frugal number, since it uses more digits than its factorization.

2028519396121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848522 (or 1424261 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

Multiplying 2028519396121 by its sum of digits (49), we get a square (99397450409929 = 9969827²).

The spelling of 2028519396121 in words is "two trillion, twenty-eight billion, five hundred nineteen million, three hundred ninety-six thousand, one hundred twenty-one".