1012001011989 has 16 divisors (see below), whose sum is σ = 1475709303360. Its totient is φ = 611789016960.

The previous prime is 1012001011961. The next prime is 1012001012041. The reversal of 1012001011989 is 9891101002101.

It is not a de Polignac number, because 1012001011989 - 2⁸ = 1012001011733 is a prime.

It is a super-2 number, since 2×1012001011989² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012001011939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38609944 + ... + 38636145.

It is an arithmetic number, because the mean of its divisors is an integer number (92231831460).

Almost surely, 2^{1012001011989} is an apocalyptic number.

It is an amenable number.

1012001011989 is a deficient number, since it is larger than the sum of its proper divisors (463708291371).

1012001011989 is a wasteful number, since it uses less digits than its factorization.

1012001011989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77246500.

The product of its (nonzero) digits is 1296, while the sum is 33.

The spelling of 1012001011989 in words is "one trillion, twelve billion, one million, eleven thousand, nine hundred eighty-nine".