21132231122 has 4 divisors (see below), whose sum is σ = 31698346686. Its totient is φ = 10566115560.

The previous prime is 21132231121. The next prime is 21132231139. The reversal of 21132231122 is 22113223112.

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., 20198378641 + 933852481 = 142121^2 + 30559^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21132231094 and 21132231103.

It is not an unprimeable number, because it can be changed into a prime (21132231121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5283057779 + ... + 5283057782.

Almost surely, 2^21132231122 is an apocalyptic number.

21132231122 is a deficient number, since it is larger than the sum of its proper divisors (10566115564).

21132231122 is a wasteful number, since it uses less digits than its factorization.

21132231122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10566115563.

The product of its digits is 288, while the sum is 20.

Adding to 21132231122 its reverse (22113223112), we get a palindrome (43245454234).

It can be divided in two parts, 2113223112 and 2, that multiplied together give a palindrome (4226446224).

The spelling of 21132231122 in words is "twenty-one billion, one hundred thirty-two million, two hundred thirty-one thousand, one hundred twenty-two".