1012120011001 has 4 divisors (see below), whose sum is σ = 1104130921104. Its totient is φ = 920109100900.

The previous prime is 1012120010953. The next prime is 1012120011047. The reversal of 1012120011001 is 1001100212101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1012120011001 - 2³¹ = 1009972527353 is a prime.

It is a super-2 number, since 2×1012120011001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012120011701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46005455035 + ... + 46005455056.

It is an arithmetic number, because the mean of its divisors is an integer number (276032730276).

Almost surely, 2^{1012120011001} is an apocalyptic number.

1012120011001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012120011001 is a deficient number, since it is larger than the sum of its proper divisors (92010910103).

1012120011001 is an equidigital number, since it uses as much as digits as its factorization.

1012120011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92010910102.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1012120011001 its reverse (1001100212101), we get a palindrome (2013220223102).

The spelling of 1012120011001 in words is "one trillion, twelve billion, one hundred twenty million, eleven thousand, one".