1222100212 has 6 divisors (see below), whose sum is σ = 2138675378. Its totient is φ = 611050104.

The previous prime is 1222100189. The next prime is 1222100221. The reversal of 1222100212 is 2120012221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1221782116 + 318096 = 34954^2 + 564^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1222100192 and 1222100201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152762523 + ... + 152762530.

Almost surely, 2^1222100212 is an apocalyptic number.

It is an amenable number.

1222100212 is a deficient number, since it is larger than the sum of its proper divisors (916575166).

1222100212 is a wasteful number, since it uses less digits than its factorization.

1222100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305525057 (or 305525055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1222100212 is about 34958.5499127181. The cubic root of 1222100212 is about 1069.1425313623.

Adding to 1222100212 its reverse (2120012221), we get a palindrome (3342112433).

The spelling of 1222100212 in words is "one billion, two hundred twenty-two million, one hundred thousand, two hundred twelve".