2112010921 has 2 divisors, whose sum is σ = 2112010922. Its totient is φ = 2112010920.

The previous prime is 2112010909. The next prime is 2112010933. The reversal of 2112010921 is 1290102112.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2112010909) and next prime (2112010933).

It can be written as a sum of positive squares in only one way, i.e., 1996749225 + 115261696 = 44685^2 + 10736^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112010921 - 2²¹ = 2109913769 is a prime.

It is not a weakly prime, because it can be changed into another prime (2112010321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056005460 + 1056005461.

It is an arithmetic number, because the mean of its divisors is an integer number (1056005461).

Almost surely, 2^2112010921 is an apocalyptic number.

It is an amenable number.

2112010921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112010921 is an equidigital number, since it uses as much as digits as its factorization.

2112010921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 2112010921 is about 45956.6199910307. The cubic root of 2112010921 is about 1283.0159434517.

It can be divided in two parts, 21120 and 10921, that added together give a square (32041 = 179²).

The spelling of 2112010921 in words is "two billion, one hundred twelve million, ten thousand, nine hundred twenty-one".