11221222212020 has 48 divisors (see below), whose sum is σ = 23801010374736. Its totient is φ = 4443463680000.

The previous prime is 11221222211981. The next prime is 11221222212103. The reversal of 11221222212020 is 2021222212211.

It can be written as a sum of positive squares in 8 ways, for example, as 855835912996 + 10365386299024 = 925114^2 + 3219532^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11221222211983 and 11221222212001.

It is a congruent number.

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, 15154010 + ... + 15877230.

It is an arithmetic number, because the mean of its divisors is an integer number (495854382807).

Almost surely, 2^{11221222212020} is an apocalyptic number.

11221222212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221222212020 is an abundant number, since it is smaller than the sum of its proper divisors (12579788162716).

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

11221222212020 is a wasteful number, since it uses less digits than its factorization.

11221222212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731012 (or 731010 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11221222212020 its reverse (2021222212211), we get a palindrome (13242444424231).

The spelling of 11221222212020 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, twenty".