11001012020 has 24 divisors (see below), whose sum is σ = 23167585224. Its totient is φ = 4387936256.

The previous prime is 11001011993. The next prime is 11001012031. The reversal of 11001012020 is 2021010011.

It can be written as a sum of positive squares in 4 ways, for example, as 240684196 + 10760327824 = 15514^2 + 103732^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11001011989 and 11001012007.

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 7 ways as a sum of consecutive naturals, for example, 772049 + ... + 786168.

It is an arithmetic number, because the mean of its divisors is an integer number (965316051).

Almost surely, 2^11001012020 is an apocalyptic number.

11001012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001012020 is an abundant number, since it is smaller than the sum of its proper divisors (12166573204).

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

11001012020 is a wasteful number, since it uses less digits than its factorization.

11001012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558579 (or 1558577 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 11001012020 its reverse (2021010011), we get a palindrome (13022022031).

The spelling of 11001012020 in words is "eleven billion, one million, twelve thousand, twenty".