2928122921 has 2 divisors, whose sum is σ = 2928122922. Its totient is φ = 2928122920.

The previous prime is 2928122807. The next prime is 2928122933. The reversal of 2928122921 is 1292218292.

2928122921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2577085225 + 351037696 = 50765^2 + 18736^2 .

It is a cyclic number.

It is not a de Polignac number, because 2928122921 - 2¹⁰ = 2928121897 is a prime.

It is a super-3 number, since 3×2928122921³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2928122221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1464061460 + 1464061461.

It is an arithmetic number, because the mean of its divisors is an integer number (1464061461).

Almost surely, 2^2928122921 is an apocalyptic number.

It is an amenable number.

2928122921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2928122921 is an equidigital number, since it uses as much as digits as its factorization.

2928122921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 2928122921 is about 54112.1328446773. The cubic root of 2928122921 is about 1430.6380384226.

The spelling of 2928122921 in words is "two billion, nine hundred twenty-eight million, one hundred twenty-two thousand, nine hundred twenty-one".