802028121 has 4 divisors (see below), whose sum is σ = 1069370832. Its totient is φ = 534685412.

The previous prime is 802028119. The next prime is 802028153. The reversal of 802028121 is 121820208.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 802028121 - 2¹ = 802028119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 802028091 and 802028100.

It is not an unprimeable number, because it can be changed into a prime (802028191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133671351 + ... + 133671356.

It is an arithmetic number, because the mean of its divisors is an integer number (267342708).

Almost surely, 2^802028121 is an apocalyptic number.

It is an amenable number.

802028121 is a deficient number, since it is larger than the sum of its proper divisors (267342711).

802028121 is a wasteful number, since it uses less digits than its factorization.

802028121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267342710.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 802028121 is about 28320.1010061758. The cubic root of 802028121 is about 929.1015800490.

Adding to 802028121 its reverse (121820208), we get a palindrome (923848329).

The spelling of 802028121 in words is "eight hundred two million, twenty-eight thousand, one hundred twenty-one".