2121011230928 has 40 divisors (see below), whose sum is σ = 4112643372936. Its totient is φ = 1059684249600.

The previous prime is 2121011230927. The next prime is 2121011231093. The reversal of 2121011230928 is 8290321101212.

It can be written as a sum of positive squares in 4 ways, for example, as 287240258704 + 1833770972224 = 535948^2 + 1354168^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2121011230894 and 2121011230903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121011230927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140820518 + ... + 140835578.

Almost surely, 2^{2121011230928} is an apocalyptic number.

It is an amenable number.

2121011230928 is a deficient number, since it is larger than the sum of its proper divisors (1991632142008).

2121011230928 is a wasteful number, since it uses less digits than its factorization.

2121011230928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21303 (or 21297 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 2121011230928 in words is "two trillion, one hundred twenty-one billion, eleven million, two hundred thirty thousand, nine hundred twenty-eight".