1021201002001 has 8 divisors (see below), whose sum is σ = 1021698649664. Its totient is φ = 1020703479120.

The previous prime is 1021201001963. The next prime is 1021201002091. The reversal of 1021201002001 is 1002001021201.

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 1021201002001 - 2²⁵ = 1021167447569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021201002091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19083655 + ... + 19137091.

It is an arithmetic number, because the mean of its divisors is an integer number (127712331208).

Almost surely, 2^{1021201002001} is an apocalyptic number.

It is an amenable number.

1021201002001 is a deficient number, since it is larger than the sum of its proper divisors (497647663).

1021201002001 is an equidigital number, since it uses as much as digits as its factorization.

1021201002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62391.

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

Adding to 1021201002001 its reverse (1002001021201), we get a palindrome (2023202023202).

The spelling of 1021201002001 in words is "one trillion, twenty-one billion, two hundred one million, two thousand, one".