1001020001121 has 12 divisors (see below), whose sum is σ = 1652477462272. Its totient is φ = 572011429176.

The previous prime is 1001020001119. The next prime is 1001020001129. The reversal of 1001020001121 is 1211000201001.

It is a happy number.

It is not a de Polignac number, because 1001020001121 - 2¹ = 1001020001119 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 (1001020001129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7944603121 + ... + 7944603246.

Almost surely, 2^{1001020001121} is an apocalyptic number.

It is an amenable number.

1001020001121 is a deficient number, since it is larger than the sum of its proper divisors (651457461151).

1001020001121 is a wasteful number, since it uses less digits than its factorization.

1001020001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15889206380 (or 15889206377 counting only the distinct ones).

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

Adding to 1001020001121 its reverse (1211000201001), we get a palindrome (2212020202122).

The spelling of 1001020001121 in words is "one trillion, one billion, twenty million, one thousand, one hundred twenty-one".