20321131222 has 32 divisors (see below), whose sum is σ = 36496742400. Its totient is φ = 8302314240.

The previous prime is 20321131217. The next prime is 20321131241. The reversal of 20321131222 is 22213112302.

It is a self number, because there is not a number n which added to its sum of digits gives 20321131222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320347 + ... + 378502.

It is an arithmetic number, because the mean of its divisors is an integer number (1140523200).

Almost surely, 2^20321131222 is an apocalyptic number.

20321131222 is a deficient number, since it is larger than the sum of its proper divisors (16175611178).

20321131222 is a wasteful number, since it uses less digits than its factorization.

20321131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698956.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20321131222 its reverse (22213112302), we get a palindrome (42534243524).

The spelling of 20321131222 in words is "twenty billion, three hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty-two".