1021010985 has 48 divisors (see below), whose sum is σ = 1805027328. Its totient is φ = 533750400.

The previous prime is 1021010981. The next prime is 1021010993. The reversal of 1021010985 is 5890101201.

It is not a de Polignac number, because 1021010985 - 2² = 1021010981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021010981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1182664 + ... + 1183526.

It is an arithmetic number, because the mean of its divisors is an integer number (37604736).

Almost surely, 2^1021010985 is an apocalyptic number.

1021010985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021010985 is a deficient number, since it is larger than the sum of its proper divisors (784016343).

1021010985 is a wasteful number, since it uses less digits than its factorization.

1021010985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 1021010985 is about 31953.2625094841. The cubic root of 1021010985 is about 1006.9551750557.

The spelling of 1021010985 in words is "one billion, twenty-one million, ten thousand, nine hundred eighty-five".