21222332142 has 32 divisors (see below), whose sum is σ = 46994373504. Its totient is φ = 6335023200.

The previous prime is 21222332141. The next prime is 21222332147. The reversal of 21222332142 is 24123322212.

21222332142 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222332141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2395209 + ... + 2404052.

It is an arithmetic number, because the mean of its divisors is an integer number (1468574172).

Almost surely, 2^21222332142 is an apocalyptic number.

21222332142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222332142 is an abundant number, since it is smaller than the sum of its proper divisors (25772041362).

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

21222332142 is a wasteful number, since it uses less digits than its factorization.

21222332142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4799344.

The product of its digits is 2304, while the sum is 24.

Adding to 21222332142 its reverse (24123322212), we get a palindrome (45345654354).

The spelling of 21222332142 in words is "twenty-one billion, two hundred twenty-two million, three hundred thirty-two thousand, one hundred forty-two".