1001201221005 has 8 divisors (see below), whose sum is σ = 1601921953632. Its totient is φ = 533973984528.

The previous prime is 1001201220997. The next prime is 1001201221049. The reversal of 1001201221005 is 5001221021001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001201221005 - 2³ = 1001201220997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 66746748067 = 1001201221005 / (1 + 0 + 0 + 1 + 2 + 0 + 1 + 2 + 2 + 1 + 0 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33373374019 + ... + 33373374048.

It is an arithmetic number, because the mean of its divisors is an integer number (200240244204).

Almost surely, 2^{1001201221005} is an apocalyptic number.

1001201221005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001201221005 is a deficient number, since it is larger than the sum of its proper divisors (600720732627).

1001201221005 is an equidigital number, since it uses as much as digits as its factorization.

1001201221005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66746748075.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 1001201221005 its reverse (5001221021001), we get a palindrome (6002422242006).

It can be divided in two parts, 100120 and 1221005, that added together give a triangular number (1321125 = T₁₆₂₅).

The spelling of 1001201221005 in words is "one trillion, one billion, two hundred one million, two hundred twenty-one thousand, five".