1222210211220 has 48 divisors (see below), whose sum is σ = 3802431769920. Its totient is φ = 325922722848.

The previous prime is 1222210211147. The next prime is 1222210211249. The reversal of 1222210211220 is 221120122221.

It is a happy number.

1222210211220 is a `hidden beast` number, since 1 + 2 + 22 + 210 + 211 + 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 = 1222210211193 and 1222210211202.

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, 1131675582 + ... + 1131676661.

It is an arithmetic number, because the mean of its divisors is an integer number (79217328540).

Almost surely, 2^{1222210211220} is an apocalyptic number.

1222210211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222210211220 is an abundant number, since it is smaller than the sum of its proper divisors (2580221558700).

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

1222210211220 is a wasteful number, since it uses less digits than its factorization.

1222210211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263352261 (or 2263352253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1222210211220 its reverse (221120122221), we get a palindrome (1443330333441).

The spelling of 1222210211220 in words is "one trillion, two hundred twenty-two billion, two hundred ten million, two hundred eleven thousand, two hundred twenty".