1020111210001 has 4 divisors (see below), whose sum is σ = 1098581303092. Its totient is φ = 941641116912.

The previous prime is 1020111209987. The next prime is 1020111210043. The reversal of 1020111210001 is 1000121110201.

1020111210001 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.

It can be written as a sum of positive squares in 2 ways, for example, as 336488165776 + 683623044225 = 580076^2 + 826815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020111210001 - 2⁹ = 1020111209489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020111210001.

It is not an unprimeable number, because it can be changed into a prime (1020111210071) 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, 39235046526 + ... + 39235046551.

It is an arithmetic number, because the mean of its divisors is an integer number (274645325773).

Almost surely, 2^{1020111210001} is an apocalyptic number.

It is an amenable number.

1020111210001 is a deficient number, since it is larger than the sum of its proper divisors (78470093091).

1020111210001 is an equidigital number, since it uses as much as digits as its factorization.

1020111210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78470093090.

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

Adding to 1020111210001 its reverse (1000121110201), we get a palindrome (2020232320202).

The spelling of 1020111210001 in words is "one trillion, twenty billion, one hundred eleven million, two hundred ten thousand, one".