1221022132 has 24 divisors (see below), whose sum is σ = 2350317312. Its totient is φ = 555007640.

The previous prime is 1221022111. The next prime is 1221022133. The reversal of 1221022132 is 2312201221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221022133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109348 + ... + 119995.

It is an arithmetic number, because the mean of its divisors is an integer number (97929888).

Almost surely, 2^1221022132 is an apocalyptic number.

It is an amenable number.

1221022132 is a deficient number, since it is larger than the sum of its proper divisors (1129295180).

1221022132 is a wasteful number, since it uses less digits than its factorization.

1221022132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229380 (or 229356 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221022132 is about 34943.1271067717. The cubic root of 1221022132 is about 1068.8280562577.

Adding to 1221022132 its reverse (2312201221), we get a palindrome (3533223353).

Subtracting 1221022132 from its reverse (2312201221), we obtain a square (1091179089 = 33033²).

The spelling of 1221022132 in words is "one billion, two hundred twenty-one million, twenty-two thousand, one hundred thirty-two".