20121222132 has 72 divisors (see below), whose sum is σ = 55944487872. Its totient is φ = 6097325520.

The previous prime is 20121222127. The next prime is 20121222139. The reversal of 20121222132 is 23122212102.

20121222132 is a `hidden beast` number, since 201 + 212 + 221 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121222139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162048 + ... + 257879.

It is an arithmetic number, because the mean of its divisors is an integer number (777006776).

Almost surely, 2^20121222132 is an apocalyptic number.

20121222132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20121222132 is an abundant number, since it is smaller than the sum of its proper divisors (35823265740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121222132 is a wasteful number, since it uses less digits than its factorization.

20121222132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419970 (or 419943 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20121222132 its reverse (23122212102), we get a palindrome (43243434234).

The spelling of 20121222132 in words is "twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred thirty-two".