1012011111001 has 32 divisors (see below), whose sum is σ = 1220134088448. Its totient is φ = 828002672640.

The previous prime is 1012011110987. The next prime is 1012011111043. The reversal of 1012011111001 is 1001111102101.

It is not a de Polignac number, because 1012011111001 - 2¹⁵ = 1012011078233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1012011111101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15524191 + ... + 15589243.

It is an arithmetic number, because the mean of its divisors is an integer number (38129190264).

Almost surely, 2^{1012011111001} is an apocalyptic number.

1012011111001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012011111001 is a deficient number, since it is larger than the sum of its proper divisors (208122977447).

1012011111001 is a wasteful number, since it uses less digits than its factorization.

1012011111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68721.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 1012011111001 its reverse (1001111102101), we get a palindrome (2013122213102).

It can be divided in two parts, 101 and 2011111001, that added together give a palindrome (2011111102).

The spelling of 1012011111001 in words is "one trillion, twelve billion, eleven million, one hundred eleven thousand, one".