1001404101243 has 16 divisors (see below), whose sum is σ = 1643329807616. Its totient is φ = 528213152160.

The previous prime is 1001404101239. The next prime is 1001404101277. The reversal of 1001404101243 is 3421014041001.

It is not a de Polignac number, because 1001404101243 - 2² = 1001404101239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1001404101283) 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, 1834073173 + ... + 1834073718.

It is an arithmetic number, because the mean of its divisors is an integer number (102708112976).

Almost surely, 2^{1001404101243} is an apocalyptic number.

1001404101243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1001404101243 is a deficient number, since it is larger than the sum of its proper divisors (641925706373).

1001404101243 is a wasteful number, since it uses less digits than its factorization.

1001404101243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668146914.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1001404101243 its reverse (3421014041001), we get a palindrome (4422418142244).

The spelling of 1001404101243 in words is "one trillion, one billion, four hundred four million, one hundred one thousand, two hundred forty-three".