1011821018201 has 16 divisors (see below), whose sum is σ = 1159523164800. Its totient is φ = 864908654208.

The previous prime is 1011821018161. The next prime is 1011821018203. The reversal of 1011821018201 is 1028101281101.

It is a cyclic number.

It is not a de Polignac number, because 1011821018201 - 2²⁶ = 1011753909337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011821018203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19560710 + ... + 19612368.

It is an arithmetic number, because the mean of its divisors is an integer number (72470197800).

Almost surely, 2^{1011821018201} is an apocalyptic number.

It is an amenable number.

1011821018201 is a deficient number, since it is larger than the sum of its proper divisors (147702146599).

1011821018201 is an equidigital number, since it uses as much as digits as its factorization.

1011821018201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59248.

The product of its (nonzero) digits is 256, while the sum is 26.

Adding to 1011821018201 its reverse (1028101281101), we get a palindrome (2039922299302).

The spelling of 1011821018201 in words is "one trillion, eleven billion, eight hundred twenty-one million, eighteen thousand, two hundred one".