1012102001001 has 48 divisors (see below), whose sum is σ = 1801403059456. Its totient is φ = 533229775488.

The previous prime is 1012102000981. The next prime is 1012102001003. The reversal of 1012102001001 is 1001002012101.

It is a happy number.

It is not a de Polignac number, because 1012102001001 - 2¹⁰ = 1012101999977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1012102001003) 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, 25765 + ... + 1422978.

Almost surely, 2^{1012102001001} is an apocalyptic number.

It is an amenable number.

1012102001001 is a deficient number, since it is larger than the sum of its proper divisors (789301058455).

1012102001001 is a wasteful number, since it uses less digits than its factorization.

1012102001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449622 (or 1449619 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1012102001001 its reverse (1001002012101), we get a palindrome (2013104013102).

The spelling of 1012102001001 in words is "one trillion, twelve billion, one hundred two million, one thousand, one".