11221210101220 has 72 divisors (see below), whose sum is σ = 27412336889280. Its totient is φ = 3847198541760.

The previous prime is 11221210101181. The next prime is 11221210101239. The reversal of 11221210101220 is 2210101212211.

It is a super-2 number, since 2×11221210101220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11221210101194 and 11221210101203.

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 23 ways as a sum of consecutive naturals, for example, 84969601 + ... + 85101559.

It is an arithmetic number, because the mean of its divisors is an integer number (380726901240).

Almost surely, 2^{11221210101220} is an apocalyptic number.

11221210101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221210101220 is an abundant number, since it is smaller than the sum of its proper divisors (16191126788060).

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

11221210101220 is a wasteful number, since it uses less digits than its factorization.

11221210101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218753 (or 218744 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11221210101220 its reverse (2210101212211), we get a palindrome (13431311313431).

The spelling of 11221210101220 in words is "eleven trillion, two hundred twenty-one billion, two hundred ten million, one hundred one thousand, two hundred twenty".