20321221122 has 48 divisors (see below), whose sum is σ = 46089838080. Its totient is φ = 6462892800.

The previous prime is 20321221121. The next prime is 20321221147. The reversal of 20321221122 is 22112212302.

20321221122 is a `hidden beast` number, since 2 + 0 + 321 + 221 + 122 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20321221095 and 20321221104.

It is not an unprimeable number, because it can be changed into a prime (20321221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216847 + ... + 296082.

It is an arithmetic number, because the mean of its divisors is an integer number (960204960).

Almost surely, 2^20321221122 is an apocalyptic number.

20321221122 is an abundant number, since it is smaller than the sum of its proper divisors (25768616958).

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

20321221122 is a wasteful number, since it uses less digits than its factorization.

20321221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513039 (or 513036 counting only the distinct ones).

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

Adding to 20321221122 its reverse (22112212302), we get a palindrome (42433433424).

The spelling of 20321221122 in words is "twenty billion, three hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-two".