11010101020020 has 96 divisors (see below), whose sum is σ = 34254394352640. Its totient is φ = 2935962933120.

The previous prime is 11010101020003. The next prime is 11010101020049. The reversal of 11010101020020 is 2002010101011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11010101019984 and 11010101020011.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 27851869 + ... + 28244411.

It is an arithmetic number, because the mean of its divisors is an integer number (356816607840).

Almost surely, 2^{11010101020020} is an apocalyptic number.

11010101020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11010101020020 is an abundant number, since it is smaller than the sum of its proper divisors (23244293332620).

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

11010101020020 is a wasteful number, since it uses less digits than its factorization.

11010101020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444502 (or 444494 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11010101020020 its reverse (2002010101011), we get a palindrome (13012111121031).

The spelling of 11010101020020 in words is "eleven trillion, ten billion, one hundred one million, twenty thousand, twenty".