1001202121 has 8 divisors (see below), whose sum is σ = 1045183104. Its totient is φ = 957258720.

The previous prime is 1001202107. The next prime is 1001202151. The reversal of 1001202121 is 1212021001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001202121 - 2⁹ = 1001201609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001202098 and 1001202107.

It is not an unprimeable number, because it can be changed into a prime (1001202101) 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, 54325 + ... + 70381.

It is an arithmetic number, because the mean of its divisors is an integer number (130647888).

Almost surely, 2^1001202121 is an apocalyptic number.

It is an amenable number.

1001202121 is a deficient number, since it is larger than the sum of its proper divisors (43980983).

1001202121 is a wasteful number, since it uses less digits than its factorization.

1001202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18791.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1001202121 is about 31641.7780947911. The cubic root of 1001202121 is about 1000.4005465410.

Adding to 1001202121 its reverse (1212021001), we get a palindrome (2213223122).

The spelling of 1001202121 in words is "one billion, one million, two hundred two thousand, one hundred twenty-one".