1012021001988 has 48 divisors (see below), whose sum is σ = 2366762798400. Its totient is φ = 336572323200.

The previous prime is 1012021001939. The next prime is 1012021002017. The reversal of 1012021001988 is 8891001202101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13316658 + ... + 13392438.

It is an arithmetic number, because the mean of its divisors is an integer number (49307558300).

Almost surely, 2^{1012021001988} is an apocalyptic number.

It is an amenable number.

1012021001988 is an abundant number, since it is smaller than the sum of its proper divisors (1354741796412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1012021001988 is a wasteful number, since it uses less digits than its factorization.

1012021001988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78308 (or 78306 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 33.

The spelling of 1012021001988 in words is "one trillion, twelve billion, twenty-one million, one thousand, nine hundred eighty-eight".