1220100222222 has 48 divisors (see below), whose sum is σ = 3041208548352. Its totient is φ = 346291448400.

The previous prime is 1220100222217. The next prime is 1220100222223. The reversal of 1220100222222 is 2222220010221.

1220100222222 is a `hidden beast` number, since 1 + 220 + 1 + 0 + 0 + 222 + 222 = 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 = 1220100222195 and 1220100222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220100222223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32044998 + ... + 32083049.

It is an arithmetic number, because the mean of its divisors is an integer number (63358511424).

Almost surely, 2^{1220100222222} is an apocalyptic number.

1220100222222 is an abundant number, since it is smaller than the sum of its proper divisors (1821108326130).

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

1220100222222 is a wasteful number, since it uses less digits than its factorization.

1220100222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64128213 (or 64128210 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1220100222222 its reverse (2222220010221), we get a palindrome (3442320232443).

The spelling of 1220100222222 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred twenty-two thousand, two hundred twenty-two".