1011821018202 has 32 divisors (see below), whose sum is σ = 2326025332800. Its totient is φ = 325643545584.

The previous prime is 1011821018161. The next prime is 1011821018203. The reversal of 1011821018202 is 2028101281101.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 323057508 + ... + 323060639.

It is an arithmetic number, because the mean of its divisors is an integer number (72688291650).

Almost surely, 2^{1011821018202} is an apocalyptic number.

1011821018202 is an abundant number, since it is smaller than the sum of its proper divisors (1314204314598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011821018202 is a wasteful number, since it uses less digits than its factorization.

1011821018202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646118187 (or 646118181 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 27.

Adding to 1011821018202 its reverse (2028101281101), we get a palindrome (3039922299303).

The spelling of 1011821018202 in words is "one trillion, eleven billion, eight hundred twenty-one million, eighteen thousand, two hundred two".