21102311322 has 20 divisors (see below), whose sum is σ = 47284809066. Its totient is φ = 7034103720.

The previous prime is 21102311317. The next prime is 21102311323. The reversal of 21102311322 is 22311320112.

21102311322 is a `hidden beast` number, since 2 + 110 + 231 + 1 + 322 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16775171361 + 4327139961 = 129519^2 + 65781^2 .

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 = 21102311295 and 21102311304.

It is not an unprimeable number, because it can be changed into a prime (21102311323) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 65130429 + ... + 65130752.

Almost surely, 2^21102311322 is an apocalyptic number.

21102311322 is an abundant number, since it is smaller than the sum of its proper divisors (26182497744).

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

21102311322 is a wasteful number, since it uses less digits than its factorization.

21102311322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130261195 (or 130261186 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21102311322 its reverse (22311320112), we get a palindrome (43413631434).

The spelling of 21102311322 in words is "twenty-one billion, one hundred two million, three hundred eleven thousand, three hundred twenty-two".