1000121001 has 8 divisors (see below), whose sum is σ = 1454721504. Its totient is φ = 606133920.

The previous prime is 1000120997. The next prime is 1000121041. The reversal of 1000121001 is 1001210001.

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

It is not a de Polignac number, because 1000121001 - 2² = 1000120997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1000121041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15153316 + ... + 15153381.

It is an arithmetic number, because the mean of its divisors is an integer number (181840188).

Almost surely, 2^1000121001 is an apocalyptic number.

1000121001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000121001 is a deficient number, since it is larger than the sum of its proper divisors (454600503).

1000121001 is a wasteful number, since it uses less digits than its factorization.

1000121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30306711.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1000121001 is about 31624.6897376085. The cubic root of 1000121001 is about 1000.0403320400.

Adding to 1000121001 its reverse (1001210001), we get a palindrome (2001331002).

The spelling of 1000121001 in words is "one billion, one hundred twenty-one thousand, one".