11111011222020 has 48 divisors (see below), whose sum is σ = 31111111243968. Its totient is φ = 2962909676160.

The previous prime is 11111011222019. The next prime is 11111011222049. The reversal of 11111011222020 is 2022211011111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6414915 + ... + 7960725.

It is an arithmetic number, because the mean of its divisors is an integer number (648148150916).

Almost surely, 2^{11111011222020} is an apocalyptic number.

11111011222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111011222020 is an abundant number, since it is smaller than the sum of its proper divisors (20000100021948).

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

11111011222020 is a wasteful number, since it uses less digits than its factorization.

11111011222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665620 (or 1665618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11111011222020 its reverse (2022211011111), we get a palindrome (13133222233131).

The spelling of 11111011222020 in words is "eleven trillion, one hundred eleven billion, eleven million, two hundred twenty-two thousand, twenty".