2013121988 has 12 divisors (see below), whose sum is σ = 3548309520. Its totient is φ = 999319272.

The previous prime is 2013121987. The next prime is 2013121993. The reversal of 2013121988 is 8891213102.

It is not an unprimeable number, because it can be changed into a prime (2013121987) 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, 1809806 + ... + 1810917.

It is an arithmetic number, because the mean of its divisors is an integer number (295692460).

Almost surely, 2^2013121988 is an apocalyptic number.

It is an amenable number.

2013121988 is a deficient number, since it is larger than the sum of its proper divisors (1535187532).

2013121988 is a wasteful number, since it uses less digits than its factorization.

2013121988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620866 (or 3620864 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 2013121988 is about 44867.8279839798. The cubic root of 2013121988 is about 1262.6704904285.

The spelling of 2013121988 in words is "two billion, thirteen million, one hundred twenty-one thousand, nine hundred eighty-eight".