1220100212 has 12 divisors (see below), whose sum is σ = 2137140096. Its totient is φ = 609488760.

The previous prime is 1220100187. The next prime is 1220100221. The reversal of 1220100212 is 2120010221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220100193 and 1220100202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135428 + ... + 144155.

It is an arithmetic number, because the mean of its divisors is an integer number (178095008).

Almost surely, 2^1220100212 is an apocalyptic number.

It is an amenable number.

1220100212 is a deficient number, since it is larger than the sum of its proper divisors (917039884).

1220100212 is a wasteful number, since it uses less digits than its factorization.

1220100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280678 (or 280676 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1220100212 is about 34929.9328942957. The cubic root of 1220100212 is about 1068.5589860422.

Adding to 1220100212 its reverse (2120010221), we get a palindrome (3340110433).

The spelling of 1220100212 in words is "one billion, two hundred twenty million, one hundred thousand, two hundred twelve".