2013121028 has 24 divisors (see below), whose sum is σ = 3850527744. Its totient is φ = 916790400.

The previous prime is 2013121013. The next prime is 2013121037. The reversal of 2013121028 is 8201213102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475388 + ... + 479603.

It is an arithmetic number, because the mean of its divisors is an integer number (160438656).

Almost surely, 2^2013121028 is an apocalyptic number.

It is an amenable number.

2013121028 is a deficient number, since it is larger than the sum of its proper divisors (1837406716).

2013121028 is a wasteful number, since it uses less digits than its factorization.

2013121028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955043 (or 955041 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 2013121028 is about 44867.8172858899. The cubic root of 2013121028 is about 1262.6702897181.

The spelling of 2013121028 in words is "two billion, thirteen million, one hundred twenty-one thousand, twenty-eight".