21232210122 has 12 divisors (see below), whose sum is σ = 46003121970. Its totient is φ = 7077403368.

The previous prime is 21232210091. The next prime is 21232210157. The reversal of 21232210122 is 22101223212.

21232210122 is a `hidden beast` number, since 212 + 322 + 10 + 122 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19340743041 + 1891467081 = 139071^2 + 43491^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1179567229 = 21232210122 / (2 + 1 + 2 + 3 + 2 + 2 + 1 + 0 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21232210095 and 21232210104.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589783597 + ... + 589783632.

Almost surely, 2^21232210122 is an apocalyptic number.

21232210122 is an abundant number, since it is smaller than the sum of its proper divisors (24770911848).

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

21232210122 is a wasteful number, since it uses less digits than its factorization.

21232210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179567237 (or 1179567234 counting only the distinct ones).

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

Adding to 21232210122 its reverse (22101223212), we get a palindrome (43333433334).

The spelling of 21232210122 in words is "twenty-one billion, two hundred thirty-two million, two hundred ten thousand, one hundred twenty-two".