2121223108 has 6 divisors (see below), whose sum is σ = 3712140446. Its totient is φ = 1060611552.

The previous prime is 2121223103. The next prime is 2121223121. The reversal of 2121223108 is 8013221212.

It can be written as a sum of positive squares in only one way, i.e., 1928790724 + 192432384 = 43918^2 + 13872^2 .

It is not an unprimeable number, because it can be changed into a prime (2121223103) 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, 265152885 + ... + 265152892.

Almost surely, 2^2121223108 is an apocalyptic number.

It is an amenable number.

2121223108 is a deficient number, since it is larger than the sum of its proper divisors (1590917338).

2121223108 is a wasteful number, since it uses less digits than its factorization.

2121223108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530305781 (or 530305779 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2121223108 is about 46056.7379218285. The cubic root of 2121223108 is about 1284.8786610434.

The spelling of 2121223108 in words is "two billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred eight".