1220100222 has 32 divisors (see below), whose sum is σ = 2726970624. Its totient is φ = 360708800.

The previous prime is 1220100221. The next prime is 1220100269. The reversal of 1220100222 is 2220010221.

It is a junction number, because it is equal to n+sod(n) for n = 1220100198 and 1220100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220100221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222738 + ... + 228149.

It is an arithmetic number, because the mean of its divisors is an integer number (85217832).

Almost surely, 2^1220100222 is an apocalyptic number.

1220100222 is an abundant number, since it is smaller than the sum of its proper divisors (1506870402).

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

1220100222 is a wasteful number, since it uses less digits than its factorization.

1220100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450944.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1220100222 is about 34929.9330374394. The cubic root of 1220100222 is about 1068.5589889615.

Adding to 1220100222 its reverse (2220010221), we get a palindrome (3440110443).

Subtracting 1220100222 from its reverse (2220010221), we obtain a palindrome (999909999).

The spelling of 1220100222 in words is "one billion, two hundred twenty million, one hundred thousand, two hundred twenty-two".