1021127085 has 24 divisors (see below), whose sum is σ = 1930859424. Its totient is φ = 495091680.

The previous prime is 1021127047. The next prime is 1021127087. The reversal of 1021127085 is 5807211201.

It is not a de Polignac number, because 1021127085 - 2⁷ = 1021126957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021127087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1030947 + ... + 1031936.

It is an arithmetic number, because the mean of its divisors is an integer number (80452476).

Almost surely, 2^1021127085 is an apocalyptic number.

1021127085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021127085 is a deficient number, since it is larger than the sum of its proper divisors (909732339).

1021127085 is a wasteful number, since it uses less digits than its factorization.

1021127085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062905 (or 2062902 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 1021127085 is about 31955.0791737401. The cubic root of 1021127085 is about 1006.9933408432.

Adding to 1021127085 its reverse (5807211201), we get a palindrome (6828338286).

The spelling of 1021127085 in words is "one billion, twenty-one million, one hundred twenty-seven thousand, eighty-five".