1221022112 has 12 divisors (see below), whose sum is σ = 2403887346. Its totient is φ = 610511040.

The previous prime is 1221022111. The next prime is 1221022133. The reversal of 1221022112 is 2112201221.

It can be written as a sum of positive squares in only one way, i.e., 1219685776 + 1336336 = 34924^2 + 1156^2 .

It is not an unprimeable number, because it can be changed into a prime (1221022111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19078439 + ... + 19078502.

Almost surely, 2^1221022112 is an apocalyptic number.

It is an amenable number.

1221022112 is a deficient number, since it is larger than the sum of its proper divisors (1182865234).

1221022112 is an equidigital number, since it uses as much as digits as its factorization.

1221022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38156951 (or 38156943 counting only the distinct ones).

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

The square root of 1221022112 is about 34943.1268205923. The cubic root of 1221022112 is about 1068.8280504220.

Adding to 1221022112 its reverse (2112201221), we get a palindrome (3333223333).

The spelling of 1221022112 in words is "one billion, two hundred twenty-one million, twenty-two thousand, one hundred twelve".