11111020211020 has 48 divisors (see below), whose sum is σ = 23441414750208. Its totient is φ = 4423790980800.

The previous prime is 11111020210951. The next prime is 11111020211041. The reversal of 11111020211020 is 2011202011111.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29027317 + ... + 29407603.

It is an arithmetic number, because the mean of its divisors is an integer number (488362807296).

Almost surely, 2^{11111020211020} is an apocalyptic number.

11111020211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111020211020 is an abundant number, since it is smaller than the sum of its proper divisors (12330394539188).

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

11111020211020 is a wasteful number, since it uses less digits than its factorization.

11111020211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387070 (or 387068 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11111020211020 its reverse (2011202011111), we get a palindrome (13122222222131).

The spelling of 11111020211020 in words is "eleven trillion, one hundred eleven billion, twenty million, two hundred eleven thousand, twenty".