11112221212020 has 72 divisors (see below), whose sum is σ = 33715393901280. Its totient is φ = 2962527307200.

The previous prime is 11112221211989. The next prime is 11112221212051. The reversal of 11112221212020 is 2021212221111.

It is an interprime number because it is at equal distance from previous prime (11112221211989) and next prime (11112221212051).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11112221211984 and 11112221212002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6890490 + ... + 8348849.

It is an arithmetic number, because the mean of its divisors is an integer number (468269359740).

Almost surely, 2^{11112221212020} is an apocalyptic number.

11112221212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112221212020 is an abundant number, since it is smaller than the sum of its proper divisors (22603172689260).

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

11112221212020 is a wasteful number, since it uses less digits than its factorization.

11112221212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15243405 (or 15243400 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11112221212020 its reverse (2021212221111), we get a palindrome (13133433433131).

The spelling of 11112221212020 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, twenty".