1000011211020 has 120 divisors (see below), whose sum is σ = 3165853244400. Its totient is φ = 264223099008.

The previous prime is 1000011211013. The next prime is 1000011211033. The reversal of 1000011211020 is 201121100001.

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 = 1000011210993 and 1000011211011.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2655030 + ... + 3008189.

It is an arithmetic number, because the mean of its divisors is an integer number (26382110370).

Almost surely, 2^{1000011211020} is an apocalyptic number.

1000011211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000011211020 is an abundant number, since it is smaller than the sum of its proper divisors (2165842033380).

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

1000011211020 is a wasteful number, since it uses less digits than its factorization.

1000011211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663349 (or 5663338 counting only the distinct ones).

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

Adding to 1000011211020 its reverse (201121100001), we get a palindrome (1201132311021).

The spelling of 1000011211020 in words is "one trillion, eleven million, two hundred eleven thousand, twenty".