1021201011001 has 4 divisors (see below), whose sum is σ = 1035584123904. Its totient is φ = 1006817898100.

The previous prime is 1021201010953. The next prime is 1021201011049. The reversal of 1021201011001 is 1001101021201.

1021201011001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1021201010953) and next prime (1021201011049).

It is a cyclic number.

It is not a de Polignac number, because 1021201011001 - 2¹⁷ = 1021200879929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021201011091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7191556345 + ... + 7191556486.

It is an arithmetic number, because the mean of its divisors is an integer number (258896030976).

Almost surely, 2^{1021201011001} is an apocalyptic number.

It is an amenable number.

1021201011001 is a deficient number, since it is larger than the sum of its proper divisors (14383112903).

1021201011001 is an equidigital number, since it uses as much as digits as its factorization.

1021201011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14383112902.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1021201011001 its reverse (1001101021201), we get a palindrome (2022302032202).

The spelling of 1021201011001 in words is "one trillion, twenty-one billion, two hundred one million, eleven thousand, one".