11221011220020 has 144 divisors (see below), whose sum is σ = 37808727747840. Its totient is φ = 2476361078016.

The previous prime is 11221011219997. The next prime is 11221011220039. The reversal of 11221011220020 is 2002211012211.

It is a super-2 number, since 2×11221011220020² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65719404 + ... + 65889923.

It is an arithmetic number, because the mean of its divisors is an integer number (262560609360).

Almost surely, 2^{11221011220020} is an apocalyptic number.

11221011220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221011220020 is an abundant number, since it is smaller than the sum of its proper divisors (26587716527820).

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

11221011220020 is a wasteful number, since it uses less digits than its factorization.

11221011220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131609382 (or 131609373 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11221011220020 its reverse (2002211012211), we get a palindrome (13223222232231).

The spelling of 11221011220020 in words is "eleven trillion, two hundred twenty-one billion, eleven million, two hundred twenty thousand, twenty".