11021211212220 has 96 divisors (see below), whose sum is σ = 37405322922240. Its totient is φ = 2671808777280.

The previous prime is 11021211212177. The next prime is 11021211212227. The reversal of 11021211212220 is 2221211212011.

11021211212220 is a `hidden beast` number, since 1 + 1 + 0 + 21 + 211 + 212 + 220 = 666.

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 = 11021211212193 and 11021211212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021211212227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 927705442 + ... + 927717321.

It is an arithmetic number, because the mean of its divisors is an integer number (389638780440).

Almost surely, 2^{11021211212220} is an apocalyptic number.

11021211212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11021211212220 is an abundant number, since it is smaller than the sum of its proper divisors (26384111710020).

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

11021211212220 is a wasteful number, since it uses less digits than its factorization.

11021211212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855422792 (or 1855422784 counting only the distinct ones).

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

Adding to 11021211212220 its reverse (2221211212011), we get a palindrome (13242422424231).

The spelling of 11021211212220 in words is "eleven trillion, twenty-one billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty".