1220211212 has 48 divisors (see below), whose sum is σ = 2419006464. Its totient is φ = 533544000.

The previous prime is 1220211211. The next prime is 1220211229. The reversal of 1220211212 is 2121120221.

It is not an unprimeable number, because it can be changed into a prime (1220211211) 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, 233387 + ... + 238557.

It is an arithmetic number, because the mean of its divisors is an integer number (50395968).

Almost surely, 2^1220211212 is an apocalyptic number.

It is an amenable number.

1220211212 is a deficient number, since it is larger than the sum of its proper divisors (1198795252).

1220211212 is a wasteful number, since it uses less digits than its factorization.

1220211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390 (or 5388 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1220211212 is about 34931.5217532818. The cubic root of 1220211212 is about 1068.5913895146.

Adding to 1220211212 its reverse (2121120221), we get a palindrome (3341331433).

Subtracting 1220211212 from its reverse (2121120221), we obtain a palindrome (900909009).

The spelling of 1220211212 in words is "one billion, two hundred twenty million, two hundred eleven thousand, two hundred twelve".