21230231122 has 4 divisors (see below), whose sum is σ = 31845346686. Its totient is φ = 10615115560.

The previous prime is 21230231119. The next prime is 21230231161. The reversal of 21230231122 is 22113203212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18414761401 + 2815469721 = 135701^2 + 53061^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21230231122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5307557779 + ... + 5307557782.

Almost surely, 2^21230231122 is an apocalyptic number.

21230231122 is a deficient number, since it is larger than the sum of its proper divisors (10615115564).

21230231122 is a wasteful number, since it uses less digits than its factorization.

21230231122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10615115563.

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

Adding to 21230231122 its reverse (22113203212), we get a palindrome (43343434334).

The spelling of 21230231122 in words is "twenty-one billion, two hundred thirty million, two hundred thirty-one thousand, one hundred twenty-two".